6. 4. BDC-4. B. A. BDC-3. A. B. SH 2. Model 387 Schematics (03 of 59) ..... CHASS9. S6. S7. 1. HOOD4. 1. HOOD7. 8. HOOD2
Model 387 Schematics (01 of 59)
SK30218
SH NO.
TRAILERLOAD CENTER
MEGA FUSES SCALE 1:20
SLEEPERLOAD CENTER
TITLE
1) INDEX SYMBOL KEY 2) HARNESS FLOWCHART 3) +12V POWER DISTRIBUTION 4) NEGATIVE POWER DISTRIBUTION 5) +12V POWER DISTRIBUTION (OPTIONAL DISCONNECT) 6) WIPER/WASHER 7) HORN 8) MANUAL FANCONTROL 9) HVACCUMMINS/CATERPILLAR 10) TURN SIGNAL/STOP/HAZARDS/AUX TRAILER 11) REVERSE LAMPS 12) MARKERLAMPS 13) HEAD LAMP/DRL 14) FOGLAMPS 15) FUEL HEATER 16) AIRDRYER 17) INTERFACE MODULE 18) SPOT LAMPS 19) LOAD LAMPS BRACKET MOUNTED/FLUSHMOUNTED/ MUTIPLE/COIL 10’ 20) FLUORESCENT LAMP SLEEPER 21) FLOORLAMP 22) ETHERSTART CATERPILLAR 23) WINDOWLIFT 24) CENTRAL DOOR LOCKS 25) DOORLAMPS/DOME LAMPS 26) PREMIUMSOUND 27) SLEEPERTOOL BOX LAMPS 28) SLEEPERCLOCK 29) AUX FAN 30) SLEEPERREADINGLAMPS 31) REFRIGERATOR UNIT REFER 32) SLEEPERPOWERACCESS OUTLETS 33) SLEEPERFLOOR LAMP 34) SLEEPERHVAC 35) DIGITAL MESSAGE CENTER 36) ABS LOW 37) ABS HI 38) CAB CIGAR LIGHTER PWRCOMM 39) SPARE SWITCHES 40) TWO SPEED/INTER/FIFTH WHEEL/DIFF LOCK/PTO 41) LOWCOOLANT 42) EATONTOP 2 TRANSMISSION 43) MIRROR CONTROL/HEATER 44) ENGINE BRAKE/CRUISE CONTROL/DIAGNOSTIC 45) RADIO 46) SPARE POWER/SYSTEMSLEEPER 47) CATERPILLAR CUMMINS ENGINE ECU/TPS/ SPEED SENSOR/INTERUPT/WARNING LAMPS 48) SMCSPEEDOMESSAGE CENTER 49) DATA LINK 50) CAB SPARE POWER/SYSTEMEXPANSION 51) CB RADIO 52) BACKLIGHTING+12VOLTS 53) NEGATIVE SWITCH LINKS 54) SPLICE LOCATION- DISTRIBUTION 55) SPLICE LOCATION- DISTRIBUTION 56) ASHTRAY 57) CAB/CHASSIS HARNESS LAYOUT 58) SLEEPERHARNESS LAYOUT 59) FUEL HOT LINE
A
SYMBOL/ABBREVIATION KEY 1) 2)
STUD S1 SPLICE
3)
RING TERMINAL CONNECTORS
4) NUMBERS EX
CIRCUIT DESCRIPTION 286
SUFFIX
-1
FOR CIRCUIT NUMBER FUNCTION SEE SK06520 5)
RED SOLIDCOLORS RED/BLACK SOLID COLORWITHSTRIPE SOLID/STRIPE
6) 7) 1 8) CLC
BUSS BAR CONNECTORAPPEARS ONMULTIPLE SHEETS CHASSIS LOAD CENTER
9) SLPR SLEEPER 10) TRLR TRAILER
11)
MULTI CORE CABLE
12)
CONTINUED TO OTHER SH XX
13)
MOMENTARY CONTACT CONTACT
14)
SHEET NUMBER
SWITCH
BULB
CHASSIS LOAD CENTER SCALE 1:20
ALPHA
A
CAB LOADCENTER (BEHIND GLOVEBOX)
SLEEPER OPTIONAL EXPANSION
01
CAB OPTIONAL EXPANSION (BEHINDGLOVEBOX)
PD8A3417.FRM
NA NA
Model 387 Schematics (02 of 59)
SK30218
A
BAT +
MEGA FUSE ASSY
ABS (HARNESS) CAB
TRAILER (HARNESS) LOAD CENTER
HOTLINE POWER
HOTLINE CHASSIS (HARNESS)
HOTLINE CAB (HARNESS)
ABS (HARNESS) CHASSIS W/L BAR
INSTRUMENTS
37WAY CHASSIS (HARNESS) LOAD CENTER
CAB (PC) LOAD CENTER
TRAILER CABLES
SLEEPER (PC) LOAD CENTER
HEADER (HARNESS) HOOD (HARNESS)
CHASSIS (HARNESS)
COWL (HARNESS)
SLEEPER (HARNESS)
ENGINE (HARNESS) CAB (HARNESS)
STOP L/P (HARNESS)
SIDE REPEATER (HARNESS)
DOOR CONTROL (HARNESS)
LOAD LIGHT (HARNESS)
DASH ENGINE HARNESS LH DOOR (HARNESS) DATA LINK RADIO HARNESS
HARNESS FLOW CHART
MIRROR GLARE STOPPER
RH DOOR (HARNESS)
MESSAGE CENTER SMC (SPEEDO MESSAGE CENTER HARNESS)
PD8b3417.frm
02
Model 387 Schematics (03 of 59)
SK30218
A
31-1 , RED ENG9
B+ ENG8 RED
+ S
RED
ALTERNATOR
G
STARTER
D+
W/L +
B+
150A
150A
100A
100A MEGA FUSES
+
RED(NOT WITH BATTERY DISCONNECT)
1 , RED
86 30
B
239-1 , BLACK
A
A
298-1 , ORANGE
7
87 85
TRLR2
CHASSIS LOAD CENTER
BATTERY DISCONNECT SOLENOID
9
1 REAR BATTERY BOX ONLY ORANGE
2B 3 298-4 , ORANGE
1 CAB LOAD CENTER
5B 6
BATTERY DISCONNECT SWITCH
298-3 , ORANGE
BATTERY DISCONNECT OPTION
CLC8
SLEEPER LOAD CENTER
B
B
298-1 , ORANGE A
A
239-1 , BLACK 298-1 , ORANGE
RED
3
CAB3
ORANGE ORANGE
BDC-1 BDC-2 239-1 , BLACK
2
SH 57 OPTIONAL
FIREWALL BLACK, 239-3
8 10
SH 2
1
4 298-2 , ORANGE
239-4 , BLACK
239-2 , BLACK
7.5A LOCATION BATTERY BOX
ORANGE
B DC-3
B
ORANGE
ORANGE
BDC-4
ORANGE
1, RED
RED
BATTERIES
S2 S1
298-1D ORANGE TRAILER LOAD CENTER
ORANGE SLPR28
ORANGE
+12V POWER DISTRIBUTION (OPTIONAL DISCONNECT) PD8b3417.frm
03
Model 387 Schematics (04 of 59)
SK30218
A
04
B+
G
LH CHASSIS RAIL + S
D+
W/L
ALTERNATOR
BLACK
B-
STARTER
ENG8
-
239-6R, BLACK
ENG6
+
BLACK
-
S1
239-7Q , BLACK
+
BLACK
239-8Q , BLACK
ENG11
239-10J , BLACK
S2
CYLINDER HEAD STUD
JUMPER, BLACK
+ 239-15G , BLACK 239-1 , BLACK
239-17D , BLACK BATTERIES
SH 5
S2
239-16, BLACK
239-4BB , BLACK
239-1JJ , BLACK CLC4
CLC6
HOOD8
SH 2
TRLR3 S2
S5
239-15H BLACK
239-3E , BLACK
SH 10 CLC9 ENGINE CAB
SH 53 SH 53 SH 24
239-16E BLACK
239-14J BLACK
239-9L BLACK
S10
S9 239-3JJ , WHITE 239-2JJ , WHITE TO TRAILER INTERFACE
CHASSIS5 AXLE
239-1F , BLACK
SH 10
SH 9
239-57B , BLACK 239-2LL , BLACK
CHASSIS7 AXLE
1
TRAILER LOAD CENTER
X1-11B, BLACK
SH 36
X1-12B, BLACK
SH 36
PASSANGER FOOTWELL 239-11J BLACK
F
CHASSIS11 TAIL LAMP ASSY
S1
NEGATIVE POWER DISTRIBUTION
FIREWALL STUD
239-1MM, BLACK
FLOOR
RADIATOR
BLACK
D
CHASSIS2REP1 SPARE S1 239-7S , BLACK
239-13G BLACK
S3
239-1KK, BLACK
LH CHASSIS RAIL
239-2KK BLACK
239-2MM, BLACK S2
239-1LL , BLACK
S4
CLC11
JUMPE,R BLACK
239-1NN BLACK
CHASSIS12
239-10L BLACK
A CHASSIS10 SPARE
SLEEPER LOAD CENTER
S2 239-16F BLACK SLPR29
SLEEPER FLOOR
PD8b3417.frm
S1
Model 387 Schematics (05 of 59)
SK30218 SH 14
298-2AB, ORANGE
A
05
CHASSIS LOAD CENTER
298-6C , ORANGE
20A
20-1 , ORN/BLACK
SH 11
SPARE
SPARE
SH13
SPARE
SPARE
SH 22 EITHER SPARE
286-1B , RED
50A
SPARE
SPARE
40A
20A
20A LH HEADLAMP SH 13
RH HEADLAMP SH 13 HVACHTR BLOWER SH 34 FAN SPARE
5A 20A FOG LAMPS
15A
15A
15A
10A
20A
10A 15A
15A SPARE
30A
SH 47 ENGINE BATTERY SH47 ENGINE BATTERY 30-1A , BLACK/ORANGE
30A SH 47 ENGINE BATTERY
30A
30A SH 47 ENGINE STOP STOP LAMP, SH 43
286-2A, RED
SH 16, AIR DRYER SH17, INTERFACE MODULE SH 17, INTERFACE MODULE
SH 9
239-12, BLACK
SH 15, FUEL FILTER
39-2 , ORANGE/BLUE
SPARE
SH 9, A/C CLUTCH
SH 9
S2
SH47, ENGINE IGNITION
3-1A , WHITE
304-1C, RED 239-12J, BLACK
SH 8, FAN )
SH 9
SH 13, DRL
SH 9
39-1A , ORANGE/BLUE
IGNITION 87 87A 85
REVERSE LAMPS
242-1B , RED
304-2B , RED
WIPER/WASHER
20A
S4
86 30
START
87 87A 85
SPARE
304-5B, RED
SPARE
20A
A8-1A, BROWN
86 30
SPARE
304-3D , RED
286-1, RED
20A
8-1A , BROWN
A29-1A, PURPLE
SH 11
SH 12 MARKER LAMPS
SH 10 TURN SIGNAL
30A
SH 10
SPARE
20A SH 13
15A
298-3B , ORANGE
SPARE 20A
29-1 , PURPLE
29-1A , PURPLE WITH OVER CRANK PROTECTION
SPARE 20A
ENG22 + S A B 286-2 , RED
A29-1 , PURPLE
SH 50 B522-1, RED/BLACK
298-1, ORANGE
SPARE
STARTER S2
239-12, BLACK 239-13, BLACK
ENG23 ENG24 A A B B ENG25 A B
239, BLACK A239, BLACK
239, BLACK
WITHOUT OVER CRANK PROTECTION
TRLR2
TRAILER LOAD CENTER
CAB LOAD CENTER
SLEEPER LOAD CENTER CAB PANEL
SH 22
1 IGNITION 0 SWITCH 3 6 2
CAB LOAD CENTER
S4 304, RED
1
A29-2 , PURPLE
12-1 , ORANGE
SH 50
298-1A , ORANGE
CAB3 1
FOR SPARE SH 46
+12V POWER AND STARTING
226-5D, RED
25A
SH 34
PD8b3417.frm
Model 387 Schematics (06 of 59)
SK30218
A
SH5 397-3A, RED FW5 7
397-1 , RED
3
398-1 , RED/BLUE
5
403-1 , RED/BLACK 402-1 , RED/YELLOW
S1
S7
239-1 , BLACK
397-2A, RED
P
FW2 WASHER MOTOR
1 FW3
CLC12 S2
404-1A ,
LtBLUE/YELLOW
239-16, BLACK
404-1B , LtBLUE/YELLOW
402-1A, RED/YELLOW 402-1B, RED/YELLOW
398-1A, RED/BLUE
403-1A , RED/BLACK
397-1B, RED
398-1B, RED/BLUE
M
404-1 , LtBLUE/YELLOW
7 6 5 4 3 2
403-1B , RED/BLACK
WIPER MOTOR
239-4 , BLACK 1
397-1A, RED
2 4
239-2 , BLACK
403-1B , RED/BLACK
402-1B , RED/YELLOW 239-47, BLACK
397-1B , RED 398-1B , RED/BLUE
S1
397-3 , RED CAB104 3 2 1
2 1 3 4
CAB9
WIPER/WASH SWITCH
WIPER/WASHER PD8b3417.frm
06
Model 387 Schematics (07 of 59)
SK30218
243-1B ,
A
FIREWALL
PINK/BLACK
CAB LOAD CENTER
PINK/BLACK
A243-1 , PINK/BLACK
243-1B , PINK/BLACK
FIREWALL
CAB40
STEERING COLUMN 1
OEM HARNESS
1
243-1A,
1
1
CLC12
FW6
243-1 ,
PINK/BLACK 239-3CC, BLACK
S1
B A
HORN
HORN PD8b3417.frm
07
Model 387 Schematics (08 of 59)
SK30218
A
SH 5
CUMMINS
RED
S1
A B
FAN SOLENOID
239-5 , 220-1 ,
BLACK WHITE/LtGREEN
FW4
226-1 ,
NOTE: FAN SHOWN IN "ON" CONDITION
8
220-1A ,
WHITE/LtGREEN
CLC12
1
3
ENGINE FAN
7
4
5 2
BLACK/GREEN
A522-1 , GREEN/WHITE A220-1 , WHITE/LtGREEN 522-1A ,
A522-1A , GREEN/WHITE A220-1A , WHITE/GREEN
WHITE/GREEN
9
2B 3
MANUAL FAN SWITCH
1 6
522-1B , WHITE/GREEN
5B 4 8 10
SH 53
B646-1A ,
239-25 , BLACK
SH 52
253-7 , LtBLUE
522-1 , B646-1 ,
CATERPILLAR
WHITE/GREEN BLACK/GREEN
13 12
OEM HARNESS
13
CUMMINS ECU
12
226-1M , RED
SH 5
NOTE: FAN SHOWN IN "ON" CONDITION
S1
B
239-5U , BLACK 220-1B , WHITE/LtGREEN
FW4-A
FAN SOLENOID
MANUAL FAN CONTROL
220-1C , WHITE/LtGREEN
A
7
A522-1B , GREEN/WHITE
1
A220-1C, WHITE/LtGREEN 522-1C , WHITE/GREEN
3 5
2
A522-1C , GREEN/WHITE
4
9
2B 3
A220-1D , WHITE/GREEN 522-1E , WHITE/GREEN
1 6
ENGINE FAN
MANUAL FAN SWITCH
5B 4 8 10
B646-1B , BLACK/GREEN
522-1D , WITE/GREEN 239-10C , BLACK
239-25C , BLACK
SH 53
253-7B , LtBLUE
SH 52
CATERPILLAR
ECU
S2
PD8b3417.frm
08
Model 387 Schematics (09 of 59)
SK30218
A
09
A B
93-1B ,
C
180-1 , YELLOW/WHITE
A
457-3 , BLACK
D
180-1 , YELLOW/WHITE
B
A220-1E, WHITE/LtGREEN
E
570-3 , YELLOW/WHITE
LtGREEN/WHITE
CATERPILLAR ECU
ENG14-A
F
A/C PRESSURE SWITCH
CAB51
239-59 , BLACK
A
152-1 , RED/YELLOW
C
342-3 , YELLOW/WHITE
E
629-2 , BLUE
F
634-2 , WHITE
G
629-1 , BLUE
342-5 , YELLOW/WHITE
A
B
TEMP
TEMP-1, GRAY/BLACK B SENSOR
A
CAB58
WHITE/LtGREEN LtGREEN
17
OEMHARNESS
18
17 18
CUMMINS ECU
ENG14
A/C PRESSURE SWITCH
HVAC
H
A220-1B, A646-1 ,
239-59 , BLACK
S16
342-1 , YELLOW/WHITE
CAB50
239-62 , BLACK
CAB LOAD CENTER
239-60 , BLACK
B
93-1A,
LtGREEN/WHITE
A
239-58 , BLACK
S13
A248-1, RED/BLACK
239-6S ,
BLACK
ENG15
A/C COMPRESSOR
253-24 , LtBLUE 570-4 , YELLOW/WHITE
SLEEPER8
S2 SH 34
8 SLPR
45-1 , LtBLUE/BLACK
D
212-1 , RED/GREEN
C
240-1 , LtGREEN/WHITE
B
153-1 , RED/BLUE
B93-2 ,
LtGREEN/WHITE
SH 5 B93-1 ,
1
CAB49 5
A629-1 , BLUE/BLACK
G
A634-1 , WHITE/BLACK
F
570-5 , YELLOW/WHITE
H
239-60 , BLACK D TEMP-1, GRAY/BLACK C
A B C D
A B C D E F G H
LtGREEN/WHITE
629-1 , BLUE
RED/GREEN 212-1 ,
RED/BLUE
CAB48
240-1 ,
153-1 ,
WHITE/BLACK
LtBLUE
YELLOW/WHITE
A634-1 ,
253-24 ,
570-5 ,
BLUE
WHITE 634-1 ,
629-2 ,
YELLOW/WHITE
BLACK
634-2 , WHITE
239-58 ,
RED/YELLOW
CAB46
342-2 ,
152-1 ,
BLUE/BLACK
YELLOW/WHITE
A629-1 ,
570-2 ,
BLACK 239-62 ,
RED/BLACK
342-4 , YELLOW/WHITE
A B C D
LtGREEN/WHITE
3 4
A/C CLUTCH
93-1 ,
A
LtGREEN/WHITE
634-1 , WHITE
B
A248-1 ,
HVAC UNIT
D
2
HVAC MODULE
E B A CAB52
93-1B, LtGREEN/WHITE 45-1 ,
239-57 , BLACK
LtBLUE/BLACK
A93-1 , LtGREEN/WHITE 45-1A, LtBLUE/BLACK
SH 4
CAB47
HVAC CONTROLLER
HVAC CUMMINS/CATERPILLAR PD8b3417.frm
SH 5
Model 387 Schematics (10 of 59) D
242-1B , RED
FLASHER UNIT
3-2 ,
86 30 87 87A 85
STOP LAMP 86 30
STOP LAMP
S6 S5
87 87A 85
87 87A 85
WHITE
GREEN
228-1B , YELLOW/BLACK
B A A B
A281-1A , WHITE 239-11A , BLACK
STP1 HOOD14
281-2 ,
228-1A, YELLOW/BLACK A281-1 , WHITE
227-1B , GREEN/BLACK
227-4 , GREEN/BLACK 228-4 , YELLOW/BLACK
85
C
37-1B , 38-1B , 227-3 , GREEN/BLACK 9 9 227-1D , 228-3 , YELLOW/BLACK 10 10 228-1D , 4 4
GREEN YELLOW GREEN/BLACK YELLOW/BLACK
LH REAR TURN SIGNAL TLJ2-B C
37A, BLACK
239-4X , BLACK
S4
CHASS1 D B A
B A
SH 12
87 87A
227-1E , GREEN/BLACK 281-1B , YELLOW/BLACK 228-1E , YELLOW/BLACK RH REAR TURN SIGNAL TLJ1-B
CLC3
239-1KL , BLACK 227-1C , GREEN/BLACK 228-1C , YELLOW/BLACK REP1
S2
239-2C , BLACK B C
LH SIDE REPEATER
REP2
239-3A , BLACK B C REP3
STP2
STOP LAMP SWITCH
TO TRAILER INTERFACE
86 30
2 2
S1
239-7 , WHITE
TURN SIGNAL
239-1A, BLACK A281-1B , WHITE
LH FRONT TURN SIGNAL
GREEN
227-1A, GREEN/BLACK
WHITE
A281-2 ,
RH FRONT TURN SIGNAL
A227-1 , GREEN 279-1 , RED A228-1 , YELLOW
WHITE 86 30
SH 5
AUX , BLUE
TURN SIGNAL
3-1A , WHITE
39-2 , ORANGE/BLUE
286-1B , RED 39-1A , ORANGE/BLUE
239-4A , WHITE
87 87A
SH 4
239-6 , WHITE
86-3
37-1A , GREEN 38-1A , YELLOW 227-2A , GREEN/BLACK 228-2A , YELLOW/BLACK 281-1A , WHITE 39-1B , ORANGE/BLUE
A281-2 , WHITE
37-1 , GREEN 38-1 , YELLOW 227-1 , GREEN/BLACK 228-1 , YELLOW/BLACK 281-1 , WHITE 39-1 , ORANGE/BLUE
87-3
85-3
86 30
85
WHITE
CAB6
239-3 , WHITE
ACC
SH 5
B
SH 5
1
239-5A, WHITE
WARNING LAMP BAR
10
CAB PANEL
281-1 , WHITE
10
SH 5
SH 5
A
A39-1 , ORANGE/BLUE
HAZARD SWITCH
228-2 , YELLOW/BLACK
CAB 24 LOAD CENTER 14 LIGHT BAR
SH 5
A CAB8
A
TRAILER LOAD CENTER
CAB PANEL
SH 5
227-2 , GREEN/BLACK
B
SH 47
C
3-1 ,
TURN SIGNAL SWITCH
SK30218
TURN SIGNAL/STOP/HAZARD/AUX TRAILER PD8b3417.frm
RH SIDE REPEATER
Model 387 Schematics (11 of 59)
SK30218
A
11
SH 5
242-2 , RED
242-1 , RED
1
3 5
4
REVERSE LAMP
2
NOT USED
A269-2 , PINK/WHITE
269-1 , PINK/WHITE
3
3
S5
269-1A , PINK/WHITE
269-3 , PINK/WHITE
269-2 , PINK/WHITE
A269-1 , PINK/WHITE
CLC3 CHASS1
A
CHASS8
REVERSE LAMP SWITCH
B A
239-7T , BLACK A269-1A , PINK/WHITE
SPARE BACKUP
S2
269, BLACK
ENG16
A
LH
REVERSE LAMPS
TLJ1-A
A
TLJ2-A
RH REVERSE LAMPS
PD8b3417.frm
Model 387 Schematics (12 of 59)
SK30218
A
12
SH 53 7
9 3
2B
239-14 , BLACK 239-13 , BLACK 239-12A , BLACK 5-1 , ORANGE/BLACK
1 6
TRAILER LOAD CENTER SH 9
SH 53
239-7 , WHITE
5B 4 8 10
CAB PANEL
CLEARANCE LAMP SWITCH
HDR2 2 1
5-1A , ORANGE/BLACK 239-1C , BLACK
HEADER
SH 5
25-1 , ORANGE/BLACK
25-2 , ORANGE/BLACK
86 30
CAB LOAD CENTER 86 30
1
5-5 , ORANGE/BLACK 239-5B , BLACK
S3
S2
239-7U , BLACK 8-3B , BROWN
6
8
HOOD3
6
8
HOOD2 1
6
8
HOOD3-A7
6
8
HOOD2-A7
2
MARKER LAMPS
1
BLACK BROWN
BLACK BROWN
HOOD7
S6
S4
8-4B ,BROWN
239-9M, BLACK 8-5B , BROWN
8-6 , BROWN
S5
1
8-1C, BROWN
2
HOOD3-A6
RH MARKER LAMP
2
1
CLC3 CHASS1
8 8
C
S7
8-3A , BROWN
CHASS2 REP1
C
HOOD4
5-2A , ORANGE
HDR6
8-2 , BROWN
A5-1A , BLACK
A
SPARE MARKER
CHASS9
SPARE MARKER
5-2AB, ORANGE
S3
8-5A , BROWN
1
A8-1 , BROWN 8-4 , BROWN
NOT USED 5-4 , ORANGE/BLACK 239-4B , BLACK
SH 5
8, BLACK
2
8-1A , BROWN
8-4A , BROWN
HDR5
8-3 , BROWN
S1 B
HOOD2-A6
LH MARKER LAMP
A
RH REPEATER
8-3H , BROWN
A5-1 , ORANGE/BLACK A8-1B, BROWN
8-1B , BROWN
5-3 , ORANGE/BLACK 239-3B , BLACK
8-2A, BROWN
1
8-2B , BROWN
2
8-1H, BROWN
HDR4
ICC LAMPS
5-1B , ORANGE/BLACK
85
CAB FIREWALL
8-2G , BROWN
5-2 , ORANGE/BLACK 239-2A , BLACK
8-5 , BROWN
1
85
8-1 , BROWN
2
MARKER
LAMP 87 87A
MARKER LAMP 87 87A
HDR3
SH 5 20-1 , ORN/BLACK
A5-2 , ORANGE/BLACK
239-15 , BLACK
REP2
A
TLJ1
RH TAIL LAMP
B
TLJ2
LH TAIL LAMP
REP3
LH REPEATER
PD8b3417.frm
Model 387 Schematics (13 of 59)
SK30218
A
13
298-5 , ORANGE TURN SIGNAL SWITCH CAB7
86
30
85
87 87A
HEADLAMP
D C B A
DM4-3, LtBLUE HI BEAM W/LAMP
A4R-1 , LtBLUE CAB LOAD CENTER
20A
DM4-1A, LtBLUE
20A
5A
3
S5
4
5
DRL LH
S2 S5
B5-1 , ORANGE/BLACK
7
9
239-19A , BLACK
239-17B , BLACK
E4-2 , LtBLUE/BLACK
SH 53
4
HI BEAM LH
3 5
2
4
HI BEAM RH
2
1
S2
1 CAB13
DRL DISABLE
4
2
B1
42-RH-2 , BLUE/WHITE 239-9 , BLACK
3 5
239-7B , BLACK 42-RH-1 , BLUE/WHITE
4 3 2
1
3
41-RH-1 , RED/BLACK
239-18B , BLACK
7 6 5
PASS SIGNAL SWITCH
242-7 , RED
242-6 , RED 242-5 , RED
5
7
DRL RH
239-13A , BLACK
1
239-16C, BLACK
SH 52
SH 52 SH 53 253- , LtBLUE 239-15E , BLACK
253-3K, LtBLUE
239-10 , BLACK
239-8A , BLACK
239-12B , BLACK B4-2B , LTBLUE
253-1 , LtBLUE
239-9A , BLACK
10 9 8
4
2
S6 227-5 , GREEN/BLACK
B4-3 , LtBLUE
HEAD LAMP SWITCH
239-14A , BLACK 228-5 , YELLOW/BLACK
3 5
B2
C1
C2 B328-1 , LtGREEN
SH 14
A42, BLUE/WHITE
SH 14
9 HOOD3-2
3 2B 1 6 5B 4 8 10
2B 3
S5
1 5B 6 4 8 10
8-5G , BROWN
BROWN
BROWN S1
2 1
DRL
3
239-1RH S2 239C, BLACK A42-RHA, BLUE/WHITE
BLACK BLACK BLUE/WHITE
41-RH, RED/BLACK 42-RH, BLUE/WHITE
RED BLUE/WHITE
A
41-LH , RED/BLACK 42-LH , BLUE/WHITE A42-LHA, BLUE/WHITE 239D, BLACK
RED BLUE/WHITE BLUE/WHITE BLACK
A
B
C
RH HEAD LAMP HOOD3-A3 HOOD2-A3
S3
HEADLAMP/DRL
S4
239-1LH 8-3J , BROWN
BLACK BROWN
C
3 1
S1
LH HEAD LAMP
B
BROWN
DRL
2 HOOD2-4
PD8b3417.frm
B4-2, LtBLUE
PARK BRAKE SWITCH
239-2LH 239-2RH A42-LH , BLUE/WHITE 42-LH-1 , BLUE/WHITE 41-LH-1 , RED/BLACK
SH 53
2
1
A328-1 , LtGREEN
253-2 , LtBLUE
1
239-38 , BLACK
SH 14 242-4 , RED
A328-1 , LtGREEN
A328-1A , LtGREEN
SH 5
B328-2 , LtGREEN
DRLDIS-1 , WHITE/BLACK 43-LH-2 , BLUE/WHITE E4-1 , LtBLUE/BLACK
DM4-2, LtBLUE
A42-RH, BLUE/WHITE
DRLDIS-1A, WHITE 42-LH-3 , BLUE/WHITE E4-1A , LtBLUE/BLACK
CAB PANEL
B4-2 , LtBLUE
239-8 , BLACK
B4-1 , LtBLUE DM4-2, LtBLUE DRLDIS-2 , WHITE/BLACK
4R-1, LtBLUE
CAB FIREWALL
B4-1A , LtBLUE DM4-2A, LtBLUE DRLDIS-2A, WHITE/BLACK
4L-1 , LtBLUE
6 LIGHT BAR
SH 52
WARNING LIGHT 6 BAR
A4L-1 , LtBLUE
D1
D2
Model 387 Schematics (14 of 59)
SK30218
CAB LOAD CENTER CAB FIREWALL
A7-2 , PURPLE
1
298-2AB , ORANGE
SH 5
27-1 , PURPLE
SH 5
A
14
3 4
5
FOG LAMP DISABLE
7-1 , PURPLE
2
CAB PANEL
SH 53
SH 52 SH 53
SH 52
A7-1 , PURPLE
239-8 , BLACK 239-9 , BLACK
A7-2 , PURPLE
4
FOG LAMP
7-2A, PURPLE
A7-1A , PURPLE
A42, BLUE/WHITE
7-3 , PURPLE
SH 13
3
2
HOOD5
S2
7-1A , PURPLE
7-2B , PURPLE 239-12 , BLACK
A
LH FOG LAMP
B
S6 HOOD6
SH 13
7-3A , PURPLE 239-13H , BLACK
A
RH FOG LAMP
B
S3
FOG LAMP SWITCH 7
1 5
239-22B , BLACK 239-22A , BLACK
253-4E , LtBLUE 239-20A , BLACK
7-3B, PURPLE
253-5C, LtBLUE
7-3B , PURPLE
SH 13
9 3
2B 1 6 5B
8
4
10
FOG LAMPS PD8b3417.frm
Model 387 Schematics (15 of 59)
SK30218
A
15
1
SH 5
382-1A, LtGREEN/RED
382-1 , LtGREEN/RED
1
FUEL HEATER
HOOD10
2
FUEL HEATER
PD8b3417.frm
Model 387 Schematics (16 of 59)
SK30218
A
HOOD12
SH 5
384-1A , BLUE
384-1 , BLUE 239-4C , BLACK
A B
S1 AIR DRYER
AIR DRYER
PD8b3417.frm
16
Model 387 Schematics (17 of 59)
SK30218
S1
S2
SH 5
A
17
S3 CHASS6
239-8B , BLACK B
AXLE TEMP REAR
A
CAB LOAD CENTER
90-1B , YELLOW/BLUE
90-1A , YELLOW/BLUE
637-1B , LtGREEN 636-1B , PURPLE/BLACK
637-1A , LtGREEN 636-1A , PURPLE/BLACK NOT USED
673-1A , RED
CAB FIREWALL
CLC3 CHASS1
36-1B , GRAY/BLACK
35-1A , GRAY/BLACK 5 5 59-1A , VIOLET 7 7
35-1B , GRAY/BLACK 241-1 , GRAY/BLACK
239-11B , BLACK 11 11 2-1A , TAN/BLACK 12 12 326-1A , GREEN
542-1A , LtGREEN
CHASS4
36-1A , GRAY/BLACK 6 6
239-6A , BLACK
AXLE TEMP FORWARD
B A CHASS3
239-12D , BLACK
AUX XMSN TEMP
A
2-1B , TAN/BLACK
B
239-4D , BLACK
S2 327-1B , BLACK
326-1B , GREEN
CHASS14
60-1 , GRAY/BLACK
326-1 , GREEN 327-1 , GRAY/BLACK
2-1 , TAN/BLACK
35-1 , GRAY/BLACK 59-1 , VIOLET
36-1 , GRAY/BLACK
637-1 , LtGREEN
90-1 , YELLOW/BLUE 673-1 , RED
542-1 , LtGREEN 636-1 , PURPLE/BLACK
NOT USED
327-1A , BLACK
B
F
A
FUEL TANK SENDER RH ENG4-B B A
PYRO
S1 HOOD14-A
337-1 , BROWN
B
338-1 ,BROWN/BLACK
A
A
AMMETER NOT AVAILABLE
INTERFACE MODULE
A
C
H
B
F
J
K
HOOD9A B
F
E
1-1 , TAN/RED
E
337-1 , BROWN
G D
338-1 , BROWN/BLACK
239-2D, BLACK
HOOD12-A
239-3C , BLACK
D
C
A
B
1-1 , TAN/RED A
F LH FUEL TANK
HOOD10A
INTERFACE MODULE
PD8b3417.frm
Model 387 Schematics (18 of 59)
SK30218
A
SH 53
239-26D , BLACK A132-1 , RED/TAN
253-8B , LtBLUE
253-7C, LtBLUE 239-27C , BLACK
SH 52 SH 52
7 2B
9
SH 53
CAB LOAD CENTER
132-1 , RED/TAN
CAB PANEL HEADER
239-11C , BLACK 132-1A , RED/TAN
132-2 , RED/TAN 239-12E , BLACK
1
2
HDR12
1
2
HDR13
3 1 6
5B 8
4 10
SPOT LAMP SWITCH
SPOT LAMPS PD8b3417.frm
18
Model 387 Schematics (19 of 59)
SK30218
A
19
J2 A
HDR11 J1
CAB LOAD CENTER
SH 52
239-54 , BLACK 253-23A , LtBLUE 7 2B
1
1
2
2
3
3
249-1C , RED/TAN 239-1D , BLACK 249-2B , RED/TAN
239-10A , BLACK
4
4
239-2B , BLACK
B
LOAD LAMPS
J3 A B
CAB FIREWALL
BRACKET MOUNTED
249-1 , RED/TAN
239-55 , BLACK
SH 53
239-56 , BLACK A249-1 , RED/TAN
CAB PANEL
HEADER
249-1A , RED/TAN 239-9B , BLACK 249-2 , RED/TAN
MUTIPLE FLUSH LOAD LAMP OPTIONS SINGLE LOAD LAMP OPTION
CAB LOAD CENTER
SLEEPER LOAD CENTER C6-SC1
SLEEPER
SLPR8 J1-SC1
7 CAB
9 3
CAB PANEL
LOAD LAMP SWITCH
SLEEPER 1
CAB FIREWALL
249-1K , RED/TAN A B B B 239-1KA , BLACK
A A
C5-SC1
7
249-2J , RED/TAN J2-SC3
J2-SC1
FLUSH MOUNTED 249-1B , RED/TAN
1
1
249-1D , RED/TAN
239-6B , BLACK 249-2A , RED/TAN 239-7C , BLACK
2
2
3
3
4
4
239-1EE , BLACK 249-1EE , RED/TAN 239-1G , BLACK
A B
1 6
SH 52
253-23B , LtBLUE
249-1E, RED/TAN
CAB LOAD CENTER HEADER
CAB PANEL
9
CAB55-SC2
1
CAB FIREWALL CAB14-SC2
HDR-1
LOAD LAMPS J3-SC4 A
A 249-1KA , RED/TAN A B 239-1KB , BLACK B
B
239-2MA, BLACK
HDR11_SC2 J1_SC2
22
249-1G , RED/TAN
1
1
249-1H , RED/TAN
6
249-2G , RED/TAN
3
3
249-2H , RED/TAN
ADDITIONAL 10’
A A
COILED
COILED-1
CABLE COILED (CONNECTION FBO) 5 AMPS MAX PER CIRCUIT
22
5B 4 8 10
SH 53
254-54D , LtBLUE
SH 52
239-23D , BLACK 7 9 2B
3 1 6
9
8
7
2
239-56F , BLACK
LOAD LAMP SWITCH 239-56E , BLACK
1 6
249-1F , RED/TAN
3
239-55E , BLACK
7
2B
239-56B , RED/TAN
239-54A , BLACK
239-55A , BLACK
SH 53
239-56A, BLACK
8 10
B
249-2JA , RED/TAN J2-SC4
J1-SC4
5B 4
A
239-2M , BLACK
J1-SC3
J3-SC1
J3-SC3
3
10
CAB45-SC2
LOAD LAMP SWITCH
5B 4
LOAD LAMPS BRACKET MOUNTED/FLUSH MOUNTED AND MULTIPLE/COILED 10’ 8 10
PD8b3417.frm
Model 387 Schematics (20 of 59)
SK30218
A
20
C6
CAB LOAD CENTER SLEEPER
1
SLPR17
2 9 3
C5
SLEEPER LOAD CENTER SLEEPER 2
1
CAB PANEL
CAB FIREWALL
2
CAB
3
253-1A, LtBLUE 239-24 , BLACK B19-1, VIOLET/WHITE A19-1, VIOLET/WHITE B19-2, VIOLET/WHITE D19-1, VIOLET/WHITE
7
239-23 , BLACK SPARE-2B , WHITE
6
SLEEPER 1
9
2
2B 3 1
5
6
3 4
8
FLUOR LAMP SWITCH
5B
4
8 10
10
SLPR18
253-9 , LtBLUE 239-24B, BLACK B19-2A, VIOLET/WHITE 280-4 , ORANGE B19-1A, VIOLET/WHITE
SH 53 SH 52
7
1
239-30 , BLACK
S5 1 2 4
SPARE-1B, WHITE
FLUOR LAMP
3
FLOUR LAMP SWITCH 7
9
2B 3 1 6 5B
4
8 10
FLUORESCENT LAMP SLEEPER
PD8b3417.frm
Model 387 Schematics (21 of 59)
SK30218
A
SH 52 CAB LOAD CENTER
S8
239-39 , BLACK 226-15 , RED
CAB PANEL
239-41 , BLACK
FRL-1 , RED/BLACK
S9
B
FRL-2 , RED/BLACK 253-17 , LtBLUE 239-40 , BLACK
A
FRL-3, RED/BLACK 239-43 , BLACK
FRL-4 , RED/BLACK
239-42 , BLACK
S5
CAB31
RH LAMP
A
B
CAB32
LH LAMP
FLOOR LAMP SWITCH 7
2B
9
3 1 6
5B
FLOOR LAMP
4
8 10
PD8b3417.frm
21
Model 387 Schematics (22 of 59)
SK30218
A
22
230-1 ,ORANGE
SH 5
A83-1A , ORANGE/WHITE 1
3 5
4
ETHER
2
SH 52
A29-2 , PURPLE A83-1 , ORANGE/WHITE
253-8 , LtBLUE 239-28 , BLACK 7
9
2B
3 1 6
5B 4 8
SH 52
239-29A , BLACK
SH 53
239-3D , BLACK
SH 53
253-9A , LtBLUE
83-1 , ORANGE/WHITE
SH 5
ENG12
83-1A , ORANGE/WHITE
1
SH 52
ETHER SWITCH
ETHER START CATERPILLAR
10
PD8b3417.frm
ETHER SOLENOID
Model 387 Schematics (23 of 59)
SK30218
A
23
CAB LOAD CENTER DOOR
253-2B , LtBLUE 239-4G , BLACK
SH 24
226-4A , RED 226-3B , RED 74-1B , TAN/WHITE 1 3
2 4
6 5 1 3 2 4 6 5 1 3 2 4 6 5
73-1B , GRAY/LtBLUE S1
POSITION 1
253-1C, LtBLUE
POSITION 2
226-1B, RED
POSITION 0
226-3, RED
POSITION 1
226-2, RED
SH 52
1 3
2 4
POSITION 0
6 5 1 3 2 4 6 5
POSITION 2
1 3 2 4 6 5
PASSENGER WINDOW LIFT
PASSENGER WINDOW LIFT 74-1A , TAN/LtBLUE 73-1A , LtBLUE/TAN
74-1C , TAN/WHITE 73-1C , GRAY/LtBLUE SH 24
S1
S4
S3
253-2L , LtBLUE
226-2G , RED 253-3 , LtBLUE
NOT USED 253-1E , LtBLUE
DOOR5-L POSITION 1
POSITION 0
POSITION 2
2 1 3 5 4 2 1 3 5 4 2 1 3 5 4
4 3
253-3A , LtBLUE
2
239-5C , BLACK
5
73-2 , LtBLUE/TAN
1
74-2 , TAN/LtBLUE
226-5 , RED SH 24
B A DOOR7-L
DOOR7-R
B A
DRIVER WINDOW LIFT M
73-2A, GRAY/LtBLUE
253-1D , LtBLUE
74-2A, TAN/WHITE
S8
226-3A , RED
226-1C , RED
239-3F , BLACK 253-2C , LtBLUE
DRIVER WINDOW LIFT
PASSENGER WINDOW LIFT MOTOR
M
CAB LOAD CENTER DOOR POSITION 1
POSITION 0
POSITION 2
SH 24
226-4 , RED 226-3 , RED
S1 POSITION 1
POSITION 0
POSITION 2
253-1S, LtBLUE
226-3, RED
253-2A , LtBLUE 239-4E , BLACK
226-2, RED 226-1D, RED
SH 52
1 3
2 4
SH 24
74-1 , TAN/WHITE
74-1E , TAN/LtBLUE
74-1D , TAN/WHITE
73-1 , GRAY/LtBLUE
73-1E , LtBLUE/TAN
73-1D , GRAY/LtBLUE
6 5 1 3 2 4 6 5 1 3 2 4 6 5 PASSENGER WINDOW LIFT
239-3F , BLACK S4
253-2D , LtBLUE 74-2B , TAN/WHITE
1 3
2 4
6 5 1 3 2 4 6 5 1 3 2 4 6 5
226-1A , RED 253-1B , LtBLUE
226-3G , RED 253-2M , LtBLUE
73-2B , GRAY/LtBLUE
S8 S3
226-2H , RED 253-3L , RED
NOT USED 253-1F , LtBLUE
S1
PASSENGER WINDOW LIFT
WINDOW LIFT
B A PASSENGER WINDOW LIFT
DOOR7-RA
M
PD8b3417.frm
Model 387 Schematics (24 of 59)
SK30218
A
24
CAB LOAD CENTER
DOOR
S5
239-4G , BLACK
239-1J , BLACK 230-1A , ORANGE
POSITION 1
1 3 2 4
POSITION 0
REF_DES7
S1
230-3A , ORANGE
S2
239-4V , BLACK
B
230-4 , ORANGE
A
S2
239-5H , BLACK
239-3F , BLACK
S4
239-4W, BLACK 253-3J , LtBLUE
S1 S3
LOCK2-1, BLACK/GRAY
230-3 , ORANGE LOCK2-1, BLACK/GRAY LOCK1-1, GRAY/BLACK 239-6C , BLACK
LOCK1-1, GRAY/BLACK LOCK1A-1, GRAY/BLACK LOCK2A-1, BALCK/GRAY
LOCK-2, BLACK/GRAY
LOCK2-1A, BLACK/GRAY
LOCK-1, GRAY/BLACK LOCK-1A, GRAY/BLACK LOCK-2A, BLACK/GRAY
LOCK1-1A, GRAY/BLACK LOCK1A-3, GRAY/BLACK LOCK2A-3, BLACK/GRAY S3
POSITION 2
6 5 1 3 2 4 6 5 1 3 2 4 6 5 B A
DOOR9
M
S4
A B
CENTRAL DOOR LOCKS
SH 23
NOT USED
LOCK2A-2, BLACK/GRAY
DOOR LOCK SWITCH
253-4 , LtBLUE 230-2 , ORANGE
239-3M , BLACK
LOCK1A-1B, GRAY/BLACK LOCK2A-1A, BLACK/GRAY
LOCK1A-2, GRAY/BLACK
SH 23
239-5C , BLACK
230-1B, ORANGE
SH 23
239-1P, BLACK
SH 4
POSITION 1
1 3
2 4
DOOR LOCK SWITCH
POSITION 0
POSITION 2
6 5 1 3 2 4 6 5 1 3 2 4 6 5
DOOR9_C0
M
PD8b3417.frm
Model 387 Schematics (25 of 59)
SK30218
A
2 1 HDR7
CAB LOAD CENTER
HEADER
1 2
19-1C , VIOLET/WHITE 239-6D , BLACK 329-1 , PINK/GREEN 19-2A , VIOLET/WHITE 239-7D , BLACK 329-2 , PINK/GREEN 19-3A , VIOLET/WHITE 239-8C , BLACK 329-3 , PINK/GREEN
3
DRIVER DOME LAMP
3
2 1
HDR8 1
CENTER DOME LAMP
2 3
3
2 1
HDR9 1 2 3
PASSANGER DOME LAMP
3
CAB42-B
CAB PANEL
329-1A , PINK/GREEN
S11 S5
329-2A , PINK/GREEN 239-49 , BLACK
B
DOOR SWITCH
A
LH
DOOR
CAB41
19-1 , VIOLET/WHITE
239-50 , BLACK 329-3A , PINK/GREEN
19-1A , VIOLET/WHITE
1
2
19-2 , VIOLET/WHITE
S5
RH
S2
19-3 , VIOLET/WHITE
19-1B , VIOLET/WHITE
2
DOOR8_C2
DOOR LH LAMP
DOOR SWITCH
B
239-1K , WHITE
239-3J , WHITE
S5
A
DOOR LAMPS/DOME LAMPS
1
DOOR8_C3
DOOR RH LAMP
PD8b3417.frm
25
Model 387 Schematics (26 of 59)
SK30218
A
A A D2 D1
DRAIN-1
DRAIN-29
433-1 , VIOLET 437-1 , VIOLET/BLACK 431-1 , GREEN 435-1 , GREEN/BLACK 432-1 , GRAY 436-1 , GRAY/BLACK
REF DES
430-1 , WHITE 434-1, WHITE/BLACK
C
D
E
F
G
B
C
D
E
F
G H
H
DRAIN-26
DRAIN-28
B
A
DRAIN-27 DRAIN-25
A
PS1
436-1 , WHITE 432-1 , BLACK
RAD2
434-1 , WHITE 430-1 , BLACK
DASH CONNECTION
PSR-1 A
436-2 , WHITE B
TWEETER
430-2 , BLACK 434-2 , WHITE
A
DRAIN
DRAIN-17 A
A
A
A
B
B
B
B
C
C
C
C
PS7L
PS8L
PS10R
PS3L
B
432-3 , BLACK PS9R
PS3R B
434-3 , WHITE 430-3 , BLACK DRAIN
A
436-3 , WHITE DRAIN-24 435-1 , WHITE 431-1 , BLACK
DRAIN-18
SPEAKER FRONT
DRAIN
437-1 , WHITE 433-1 , BLACK
A
TWEETER
DRAIN
DRAIN-22
PS2L-1
SPEAKER FRONT
B
436-2 , BLACK
CAB LOAD CENTER 239-1 , BLACK 19-1 , VIOLET/WHITE A252-1 , RED
A
B
C
D
E
F
PS12
A
B
C
D
E
F
PS11
RADIO/ CB
DRAIN
DRAIN-19
DRAIN-20
PS4L
PS4R
433-2 , BLACK
B
431-22 , BLACK
437-2 , WHITE
A
ANTENNA RADIO PWR_NEG , BLACK PWR_POS , RED PS6
E
F
DRAIN-21
435-2 , WHITE
B
437-3 , WHITE 4353-3 , BLACK DRAIN-23
A
435-3 , WHITE 431-3 , BLACK
SPEAKER REAR
B-PILLAR FLOOR GROUND
DRAIN
B
C
H
A
D
G
SPEAKER REAR
DRAIN DRAIN
SUB WOOFER PS5
PREMIUM SOUND
1
2
SLEEPER SPARE POWER SH 46
PD8C3417.FRM
26
Model 387 Schematics (27 of 59)
SK30218
A
329-4, PINK/GREEN
SH 33
SLPR9 1 2
SLEEPER LOAD CENTER
SLEEPER 1
LH TOOL BOX LAMP
329-1B , PINK/GREEN 239-8D , BLACK 389-1 , GRAY 239-9C , BLACK 329-2B , PINK/GREEN 239-10B , BLACK 389-2 , GRAY 239-11D , BLACK
LH DOOR SWITCH
SLPR11 1 2
RH TOOL BOX LAMP
RH DOOR SWITCH
SLEEPER TOOL BOX LAMPS PD8C3417.FRM
27
Model 387 Schematics (28 of 59)
SK30218
A
28
SLEEPER LOAD CENTER
SLEEPER 1
226-1E , RED 280-2 , ORANGE 239-5F , BLACK
12:00
CLOCK
SLEEPER CLOCK
PD8C3417.FRM
Model 387 Schematics (29 of 59)
SK30218
A
29
CAB LOAD CENTER HDR14
HEADER
229-1 , VIOLET/WHITE 239-13B , BLACK
1 2
M
AUX FAN
PD8C3417.FRM
AUX FAN
Model 387 Schematics (30 of 59)
SLEEPER LOAD CENTER
SK30218
30
W/LOWER BUNK SLPR3 1
SLEEPER 1
A
19-1D , VIOLET/WHITE 239-1L , BLACK 19-2B , VIOLET/WHITE 239-2G , BLACK
2
19-2G , VIOLET/WHITE
RH READING LAMP SLPR3-SC1
SLPR4 1 2
J2-SC2
RH READING LAMP
J3-SC2
HI/RH READING LAMP
1 1
LH READING LAMP
2
1 2
19-1G , VIOLET/WHITE 239-1AH , BLACK
1 2 2
J1-SC2
239-2AH , BLACK
W/UPPER BUNK SLEEPER LOAD CENTER 19-2H , VIOLET/WHITE
SLPR1-SC1 13
SLEEPER 1
1 14 2
SLEEPER READING LAMPS
19-1DA , 239-1LA , 19-2BA , 239-2GA ,
VIOLET/WHITE BLACK VIOLET/WHITE BLACK
SLPR4_SC1 1
1
2
2
J2-SC5
19-1H , VIOLET/WHITE 239-1AJ , BLACK
LH READING LAMP
J3-SC5
1
1
2
2
J1-SC5
239-2AJ , BLACK
PD8C3417.FRM
HI/LH READING LAMP
Model 387 Schematics (31 of 59)
SK30218
A
253-2R, LtBLUE
SH 52
239-20 , BLACK 253-1H , LtBLUE 239-15A , BLACK
SLPR30
REFER
2 1
REFRIGERATOR ON/OFF SWITCH
BREF-1, BLACK/YELLOW 239-37, BLACK
REF1-1, RED 239-22 , BLACK
SLEEPER LOAD CENTER
SLEEPER 2 AREF-1, YELLOW/BLACK
COOLING FAN
SLPR16
FAN2
FAN1 B
A
A
RED BLACK
B
B
A
A
1
2
, BLACK RED
B
FAN4
FAN3
REFRIGERATOR UNIT/REFR
REFRIGERATOR
FAN
B
B
A
A
1 2
PD8C3417.FRM
31
Model 387 Schematics (32 of 59)
SK30218
SLEEPER LOAD CENTER
SLEEPER 2
A
SLPR21-A
280-1 , YELLOW 239-27A , BLACK 242-1A , RED 139-13A , BLACK 242-2A , RED 239-14B , BLACK
1
SLPR22-A
POWER ACCESS
1
SLPR19-A 1 2
POWER OUTLET
SLPR20-A 1 2
POWER OUTLET
SLEEPER POWER ACCESS OUTLETS
PD8C3417.FRM
32
Model 387 Schematics (33 of 59)
SK30218
A
33
SLPR13-A 1
SLEEPER LOAD CENTER SLEEPER 1
A329-12, RED
2
FLOOR LAMP
239-12, BLACK 329-6, RED
SH 27 329-4, PINK/GREEN
FLOOR LAMP SWITCH
SLEEPER FLOOR LAMP
PD8C3417.FRM
Model 387 Schematics (34 of 59)
SK30218
SLEEPER LOAD CENTER
CAB
152-1A , RED/YELLOW 153-1A , RED/BLUE 240-1A , LtGREEN/WHITE
253-10A , LtBLUE 570-1 , YELLOW/WHITE 226-5A , RED
SH 5
87 87A
239-35, BLACK
248-1 , RED
SLEEPER HVAC
S5
3
BLOWER MOTOR RESISTORS
A B
BLOWER MOTOR
30
SLEEPER HVAC 85
2
SPR25-A
153-2 , RED/BLUE 239-18 , BLACK 86
1
S2 239-26A , BLACK
SLEEPER 2
SLPR23-A
A248-1A , RED/BLACK
SH 9
A
239-25A , BLACK 629-1A , BLUE
BUNK TEMP ACTUATOR
630-1 , RED/BLUE
HVAC CONTROL HEAD
PD8C3417.FRM
34
Model 387 Schematics (35 of 59)
SK30218
SPARE IGN POWER
DIGITAL MESSAGE CENTER
226-1F , 230-1C , 239-1M, 417-1C , 418-1C , 253-1J ,
RED ORANGE BLACK PURPLE WHITE LtBLUE
2
35
SH 50 TO OPTIONAL SPARE/ POWER EXPANSION
DMC3 1
A
SPARE BAT POWER
SH 50
SH 49 SH 49
SH 52
DIGITAL MESSAGE CENTER
PD8C3417.FRM
Model 387 Schematics (36 of 59)
SK30218
A
36
ABS1
1 10 8
SH 4 SH 4
5 2 7 6 12 4 9
ABS LIGHT BAR
18
18
19
19
20
20
21
21
WARNING LAMP BAR RF SENSOR AND PMV CONNECTORS 1
2 ABS2-B1
X2-3 , X2-1 , X2-2 , X2-4 , X2-5 ,
X3-7 , X3-8 , X3-9 , X3-4 , X3-5 ,
BLUE BROWN GREEN/YELLOW BROWN BLACK
GND-A, GREEN/YELLOW A GND-B, GREEN/YELLOW B X2-1 , BLUE C X3-7 , BLUE D X4-1 , BLUE E X4-10 , BLUE F X2-2 , BROWN G X3-8 , BROWN H X4-2 , BROWN J X4-11 , BROWN K
A
2
ABS6-B1 1
L
L
B C D E F G H J K
X2-4 , BROWN N N X2-5 , BLACK X3-4 , BROWN X3-5 , BLACK X4-5 , BROWN X4-6 , BLACK X4-8 , BROWN X4-9 , BLACK
P P Q Q R R S S T T U U V V
ABS7-B1
ABS10-B1
A1 A1 B1 B1 C1 C1 D1 D1 E1 E1 F1 F1 G1 G1
2
1
ABS4-B1
3
2
1
X4-2B X4-1B X1-12-2
Z Z
2
X1-12-5 X5-1B X5-10B X5-2B X5-11B X5-5B X5-6B X5-8B X5-9B X4-14B X4-15B X1-12-6
X5-1B X5-10B X5-2B X5-11B X5-5B X5-6B X5-8B X5-9B X4-14B X4-15B X4-6B X4-5B
Y Y
1
ATC CONNECTOR (OPTION)
ABS11-B1
X2-2B X2-1B X1-12-4
X X
ABS LOW
3
X4-4B X4-7B
W W
X4-3 , GREEN/YELLOW X4-12 , GREEN/YELLOW X4-1 , BLUE X4-10 , BLUE X4-2 , BROWN X4-11 , BROWN X4-5 , BROWN X4-6 , BLACK X4-8 , BROWN X4-9 , BLACK
2
X1-12-3 X4-10B X4-11B
X1-12-1 X1-12-6 X1-12-2 X1-12-3 X1-12-4 X1-12-5 X2-1B X3-7B X4-1B X4-10B X2-2B X3-8B X4-2B X4-11B X4-4B X4-7B X2-4B X2-5B X3-4B X3-5B X4-5B X4-6B X4-8B X4-9B
M M
S1
RR SENSOR AND PMV CONNECTORS
3 ABS3-B1 1
X4-8B X4-9B
3
X2-5B X2-4B
ABS ECU
GREEN/YELLOW BLUE BROWN BROWN BLACK
2
11
ABS2 ABS1-B1
S2
1
X1-12-1 X3-7B X3-8B
X1-6-1 , ORANGE/PURPLE X1-7 , RED X1-8 , ORANGE X1-9 , ORANGE X1-10 , BLACK X1-16-1 , ORANGE/PURPLE X1-17 , BLACK/LtGREEN X1-18 , VIOLET/BROWN
X3-4B X3-5B
X1-11 , BLACK X1-12 , BLACK X1-6-1 , ORANGE/PURPLE X1-7 , RED X1-8 , ORANGE X1-9 , ORANGE X1-10 , BLACK X1-16-1 , ORANGE/PURPLE X1-17 , BLACK/LtGREEN X1-18 , VIOLET/BROWN
CAB LOAD CENTER
ABS5-B1
LF SENSOR AND PMV CONNECTORS
2
1
ABS8-B1
3
2
1
1 2 3 4 5 6 7
6-CHANNEL CONNECTOR (OPTIONAL)
8 9 10 11 12
ABS9-B1
LR SENSOR AND PMV CONNECTORS
PD8C3417.FRM
Model 387 Schematics (37 of 59)
SK30218 9
239-1N , BLACK
CAB LOAD CENTER
10
18
18
19
19
1
X1-6-1A , ORANGE/PURPLE 2 7 ABS X1-7A , RED 6
X1-10A , BLACK X1-16-1A , ORANGE/PURPLE
4
RF SENSOR AND PMV CONNECTORS
20
1
ABS2-B2
B A
SH 49 J1587 ABS2-A ABS1-B2 X1-12-1A
S2
X2-3A , GREEN/YELLOW
X2-1A , BLUE C C X3-7A , BLUE D D
X2-4A , BROWN X2-5A , BLACK
X4-1A , BLUE E E X4-10A , BLUE F F
X4-1C X4-10C
X2-2A , BROWN G G X3-8A , BROWN H H
X2-2C X3-8C
X4-2A , BROWN J J X4-11A , BROWN K K X4-4A , BROWN L L
X4-2C
X3-9A , GREEN/YELLOW X3-4A , BROWN
X4-7A , BLUE M M X2-4A , BROWN N N
X4-7C X2-4C
X3-5A , BLACK
X2-5A , BLACK P P X3-4A , BROWN Q Q
X2-5C X3-4C
X3-5A , BLACK R R X4-5A , BROWN S S
X3-5C X4-5C
X4-6A , BLACK T T X4-8A , BROWN U U
X4-6C X4-8C
X4-9A , BLACK V V
X4-9C
X4-3A , GREEN/YELLOW X4-12A , GREEN/YELLOW X4-1A , BLUE X4-10A , BLUE X4-2A , BROWN X4-11A , BROWN X4-4A , BROWN X4-7A , BLUE X4-5A , BROWN X4-6A , BLACK X4-8A , BROWN X4-9A , BLACK
S1
2
3
ABS3-B2
RR SENSOR AND PMV CONNECTORS 1
2
ABS6-B2
X5-6A , BLACK X5-8A , BROWN
ABS7-B2
X4-4C
1
X4-7C
2
X1-12-5A
1
X5-1C X5-10C
X5-1C X5-10C
2
X5-2A , BROWN Z Z X5-2C X5-11A , BROWN A1 A1 X5-11C
X5-2C X5-11C
4
X5-5A , BROWN B1 B1 X5-5C X5-6A , BLACK C1 C1 X5-6C
X5-5C X5-6C
6
X5-8A , BROWN D1 D1 X5-8C X5-9A , BLACK E1 E1 X5-9C
X5-8C X5-9C
8
X5-1A , BLUE X X X5-10A , BLUE Y Y
ATC CONNECTOR (OPTION)
ABS11-B2
W W
X4-14C G1 G1 X4-15C
1
ABS5-B2
2
1
ABS8-B2
X1-12-2A
2
X4-2C X4-1C
ABS4-B2 3
LF SENSOR AND PMV CONNECTORS
X4-5C
1
X2-1C X1-12-4A
2
X2-2C
X4-14C X4-15C X4-6C
X5-11A , BROWN X5-5A , BROWN
3
ABS10-B2
X2-4C
X5-10A , BLUE X5-2A , BROWN
2
X4-11C X4-4C
F1 F1
X5-3A , GREEN/YELLOW X5-12A , GREEN/YELLOW X5-1A , BLUE
1
X1-12-6A X1-12-2A X1-12-3A X1-12-4A X1-12-5A X2-1C X3-7C
X2-5C
ABS ECU
GND-AA, GREEN/YELLOW A A GND-BB, GREEN/YELLOW B B
X2-1A , BLUE X2-2A , BROWN
X3-7A , BLUE X3-8A , BROWN
1
21
21
3 ABS10-A
X1-14A , PURPLE
2
11
X4-10C X4-11C
LIGHT BAR 20
9
X1-12-3A
X1-18A , VIOLET/BROWN X1-13A , WHITE
12
X4-9C
X1-17A , BLACK/LtGREEN X1-18A , VIOLET/BROWN
X1-16-1A , ORANGE/PURPLE X1-17A , BLACK/LtGREEN
WARNING LAMP BAR
X4-8C
X1-11A , BLACK X1-12A , BLACK
X1-8A , ORANGE X1-9A , ORANGE
X3-4C X3-5C
X1-9A , ORANGE X1-10A , BLACK
X3-7C X3-8C
X1-6-1A , ORANGE/PURPLE X1-7A , RED X1-8A , ORANGE
ABS1-A
X1-16-2 , ORANGE/PURPLE 8 5 253-1K , LtBLUE
X1-12-1A
SH 4
SH 4
4
8 10
239-3K, BLACK 239-2H , BLACK
1 6 5B
ABS SWITCH
3
X1-6-2 , ORANGE/PURPLE
7 2B
A
3
1
2
X1-12-6A
ABS9-B2
LR SENSOR AND PMV CONNECTORS
3
5
6-CHANNEL CONNECTOR (OPTIONAL)
7
9 10 11 12
ABS HI
X5-9A , BLACK
PD8C3417.FRM
37
Model 387 Schematics (38 of 59)
SK30218
A
38
CAB LOAD CENTER
OUTLET 1
CAB54
1
CAB33
1
CAB35
1
CAB36
1
239-44 , BLACK
4
280-2A, ORANGE 239-45 , BLACK 280-1A, ORANGE
2
CAB CIGAR LIGHTER/POWER CONNECTION PD8C3417.FRM
CAB34
Model 387 Schematics (39 of 59)
SK30218
A
S7 S6
239-37 , BLACK 253-16 , LtBLUE
226-14 , RED 239-35 , BLACK
S5
SPARE
SPARE "A"
SPARE "B" PD8C3417.FRM
39
Model 387 Schematics (40 of 59)
SK30218
A
WARNING LAMP BAR 17
9
17
9
LIGHT BAR
CAB LOAD CENTER
CAB FIREWALL
CAB PANEL
SPARE-1A, GRAY/BLACK
226-10A , RED
S7 S6
CAB23 A B C D
INTER AXLE
A B C D
FIFTH WHEEL
253-15 , LtBLUE
239-36 , BLACK
SPARE, GRAY/BLACK
253-13 , LtBLUE
239-34 , BLACK
226-13 , RED CAB24
192-1 , ORANGE/BLACK
253-12 , LtBLUE
145-1 , WHITE/RED
239-33 , BLACK
226-12 , RED
253-11 , LtBLUE
A B C D
TWO SPEED AXLE
CAB25
DIFF LOCK/ PTO
1 1
SPARE-1, WHITE CHASS13
239-32 , BLACK
226-11 , RED SPARE-A , GRAY/BLACK CLC3 CHASS1
A90-1, YELLOW/BLUE
S5
1
TWO SPEED AXLE/INTER AXLE/ FIFTH WHEEL/DIFF LOCK/PTO SPARE
PD8C3417.FRM
40
Model 387 Schematics (41 of 59)
SK30218
CLC12
517-1 , RED/GREEN 519-1 , LtGREEN/BLUE 520-1 , LtGREEN/PINK 518-1 , BLACK/PINK
7
CUMMINS 6 ENGINE 5 ECU
19
41
CUMMINS
OEM ENGINE HARNESS
ECU 31
A
567-1A , RED/GREEN 568-1A , LtGREEN/BLUE 569-1A , LtGREEN/PINK 457-5 , BLACK
10 12 11 9
FW7
567-1 , RED/GREEN 568-1 , LtGREEN/BLUE 569-1 , LtGREEN/PINK 457-1 , BLACK
C C A
A
D D B
LOW COOLANT PROBE
B
CATERPILLAR ENG2A 2
CAT ENGINE ECU
54 49 18
567-1B , RED/GREEN 568-1B , LtGREEN/BLUE 569-1B , LtGREEN/PINK 457-2A , BLACK 457-4A , BLACK S3
CLC2-B ENG3-C B5 B5
FW7-A
CLC12-B FW1-B
567-1C , RED/GREEN C1 C1 568-1C , LtGREEN/BLUE C2 C2 569-1C , LtGREEN/PINK C3 C3 457-5B , BLACK
10 10 12 12 11 11 9
9
567-1D , RED/GREEN 568-1D , LtGREEN/BLUE 569-1D , LtGREEN/PINK 457-1C , BLACK
C A D B
LOW COOLANT
PD8C3417.FRM
LOW COOLANT PROBE
Model 387 Schematics (42 of 59)
SK30218
A
ENG18-B C
ENGINE CATERPILLAR ECU
680-1 , RED 679-1 , YELLOW 239-9H, BLACK
A B
S2
ENG20
ENGINE CUMMINS ECU
OEM HARNESS
8 9 11
680-1A, RED 679-1A , YELLOW RTN-1, BLACK/RED
A B C
EATON TOP 2 TRANSMISSION
PD8C3417.FRM
42
Model 387 Schematics (43 of 59)
SK30218 574-2 , TAN/LtBLUE
574-1 , TAN/LtBLUE
573-2 , TAN/LtBLUE 665-1A , BLUE/TAN
573-1 , LtBLUE/TAN 665-1 , BLUE/TAN
A
43
574-1B , TAN/LtBLUE
302-2 , BROWN/YELLOW
S4
302-3 , BROWN/YELLOW
S5
302-1A , BROWN/YELLOW
S3
S1
S2
S2
573-1B , TAN/LtBLUE 665-1B , WHITE/TAN
239-2L , BLACK
S2
1
2
3
4
7
6
5
DOOR10-L
A
B
C
DORR3-L
A
B
302-4 , BROWN/YELLOW
239-5X , BLACK 253-4CC, LtBLUE
239-6T , BLACK
230-5B , ORANGE 302-1C, BROWN/YELLOW
239-7E , BLACK
302-1 , BROWN/YEL
665-3 , WHITE/TAN
573-1A , WHITE/ORANGE
574-1A , GRAY/VIOLET
226-2B , RED
239-2K , BLACK
665-2 , TAN/TAN
S8
C
B
DOOR3-R
A
M
M
RH MIRROR MIRROR HEAT
HEATED MIRROR SWITCH
DOOR11-L
7
M
9
1 6 5B 4
LH MIRROR
MIRROR HEAT 8 10
GREEN 7 1
LT GREEN/YELLOW BLACK
4
LT GREEN/BLACK 5
663-1 , LTBLUE/TAN
663-2 , LTBLUE/TAN
253-1AZ , LTBLUE
6
239-1AZ , BLACK
LT GREEN BROWN 2 3
1 MT4
MIRROR
1 MT6
239-2BZ, BLACK
253-2AX, LTBLUE
GREEN/RED
A DOOR5-R
2B 3
M
B
2
1 MT5
BACKLIGHTING
GLARESTOPPER SWITCH 7
MIRROR SWITCH
226 , RED
1 MT1
1 MT3
CAB SPARE POWER MIRROR
9
2B 3 1 6 5B
MIRROR CONTROL/HEATER/GLARESTOPPER
4
8 10
GLARESTOPPER OPTIONAL
PD8C3417.FRM
Model 387 Schematics (44 of 59)
SK30218
A
44
646-1 , BLACK 532-1 , PINK/GREEN 530-1 , YELLOW CUMMINS ENGINE ECU
ENG5
EE28-1 , GREEN
529-1 , BLUE 647-2 , GREEN/BLACK 646-2 , BLACK 531-1 , PINK
S1
EE01-3 , BLACK/WHITE
EE28-1 , GREEN EE01-4 , BLACK/WHITE
EE01-4 , BLACK/WHITE EE05-1 , LtGREEN/BLACK
B226-1 , RED/BLUE 239-6E , BLACK
466-1 , WHITE/RED 462-1 , YELLOW
457-8 , BLACK
3 2B 5B
239-5G , BLACK 253-4A , LtBLUE B226-1 , RED/BLUE
EE11-1 , GREEN/WHITE EE16-1 , BLUE
9
1 6
ENGINE BRAKE ON/OFF SWITCH
4
8 10
457-7 , BLACK 7
463-1 , PINK 225-1 , LtGREEN/BLACK
EE05-1 , LtGREEN/BLACK
EE06-1 , YELLOW/BLACK EE04-1 , LtGREEN/YELLOW
EE04-1 , LtGREEN/YELLOW 239-4J , BLACK
EE08-1 , BLUE
253-3C , LtBLUE
EE17-1 , YELLOW
ENGINE BRAKE SELECTOR SWITCH
5B 4
EE07-1, PINK
EE17-1, YELLOW 239-4AA, BLACK
EE01-5, BLACK
253-2Q, LtBLUE
226-2C, RED
SH 52
EE01-6, BLACK/WHITE
EE08-1 , BLUE
SH 53
239-3FF , BLACK A226-1 , RED/BLUE
253-2P , LtBLUE 253-1U , LtBLUE
A226-1 , RED/BLUE
239-1HH , BLACK
SH 52 SH 52
EE11-1 , GREEN/WHITE
226-1H , RED
EE16-1, BLUE
EE01-7 , BLACK/WHITE
SH 53
SH 52 A
239-7N, BLACK EE15-1 , LtGREEN
253-5B , LtBLUE
NEUTRAL SWITCH
239-2GG, BLACK 239-2HH, BLACK
SH 53
1 6
8 10
SH 53 SH 53 SH 53
9
2B 3
EE07-1 , PINK
A508-1 , BLUE 465-1 , GREEN
ENG17-B
B
ENG 7
239-13J , BLACK
CAT ENGINE ECU
461-1 , BLUE 224-1 , LtGREEN/YELLOW
7
AEE02-1 , BLACK/LtGREEN 226-2C , RED
S4
CLUTCH SWITCH
1
EE01-1 , BLACK/WHITE
648-1 , LtGREEN/BLACK 534-1 , GREEN
457-1A , BLACK
1 ENG6
647-1 , LtGREEN/YELLOW
S2
A509-1 , BLUE
NOT USED
9
CAB LOAD CENTER
2B 3
7
9
2B 3
1
7
1
1
6
6
5B 4
5B 4
8 10
8 10
DIAGNOSTIC SWITCH
CRUISE ON/OFF SWITCH
9
2B 3
6 5B 4 8 10
CRUISE SET/RESUME SWITCH
ENGINE BRAKE/CRUISE CONTROL/DIAGNOSTIC PD8C3417.FRM
CAB LOAD CENTER
RAD_2A
RAD_1A RAD_2 D D
C C
B B
A A
435-1 , 431-1 , 434-1 , 430-1 ,
RMT_1
REMOTE
1
FRONT SPEAKER
RADIO/CB RAD_3B
GREEN/BLACK GREEN WHITE/BLACK WHITE
RMT D5A H5A G5A F5A E5A C5A A5A B5A D4A C4A B4A A4A
432-1 , GRAY 436-1 , GRAY/BLACK 433-1 , VIOLET 437-1 , VIOLET/BLACK
RAD_1
D C B A RAD_4
D C B A RAD_4A
A A
B
C
B
C
D D
B A
REAR_SPKR_POS-B , WHITE REAR_SPKR_NET-B , BLACK
A
FR_SPKR_POS-B , WHITE FR_SPKR_NEG-B , BLACK
B
GREEN GREEN/BLACK VIOLET VIOLET/BLACK
REAR SPEAKER
431-1 , 435-1 , 433-1 , 437-1 ,
A
19-1F , VIOLET/WHITE 239-1B , BLACK A252-1A , RED
B
430-1 , WHITE 434-1 , WHITE/BLACK 432-1 , GRAY 436-1 , GRAY/BLACK 19-1F , VIOLET/WHITE 239-1B , BLACK A252-1A , RED
RAD_3A
WHITE WHITE/BLACK GRAY GRAY/BLACK YELLOW BLACK RED GREEN GREEN/BLACK VIOLET VIOLET/BLACK
BLUE
FRONT SPEAKER
REAR_SPKR_POS-A , WHITE REAR_SPKR_NEG-A , BLACK
FR_SPKR_POS-A , WHITE FR_SPKR_NEG-A , BLACK
Model 387 Schematics (45 of 59) SK30218 A
REAR SPEAKER
B A RAD_2B
RAD_1B
B-PILLAR FLOOR GROUND
RAD_P1
ANTENNA
RADIO
RADIO PD8C3417.FRM
45
Model 387 Schematics (46 of 59)
MAIN POWER
3
298-8A , ORANGE
2
304-9C , RED 239-32C , BLACK
1
SK30218
A
46
S4
304-1D , RED
SLPR31
298-6D , ORANGE
SLEEPER LOAD CENTER
16 86-1 30-1
85-2 87-2 87A-2
85-1 87-1 87A-1
286-1C , RED B252-1 , RED/BLACK 239-29, BLACK 239-34, BLACK
SLEEPER 2
86-2 30-2
22
17
23
18
24
19
25
20
26
252-2B , RED 252-1B , RED A252-1B , RED A252-2B , RED 226-3H , RED BAT_1
BAT_2
3_IGN 4_IGN
5_ACC 6_ACC
27
28
S3 29
30
31
298-1E , ORANGE
SH 3
239-16G , BLACK
SH 4
32
230-1H , ORANGE 230-2F , ORANGE 262-2 , RED 33
7
SLPR7
S2
34
35
36
37
38
305-6A , RED 304-7C , RED 298-5D , ORANGE 298-4C , ORANGE
239-17E , BLACK 239-19, BLACK
S2
298-2C , ORANGE
SPARE POWER SYSTEM EXPANSION SLEEPER
PD8C3417.FRM
Model 387 Schematics (47 of 59)
SK30218
464-1A, WHITE
INTERUPTER OPTION
577-2 , BLACK 577-1A, BLACK 455-1 , RED 576-2 , ORANGE
455-1A, RED
1
1
455-1B, RED
455-2A, RED
THROTTLE PEDAL CAT
A SPEED B SENSOR ENG13-B
EE14-2, BLUE
S1
30-4A, 30-3A, 30-1B, 533-1A,
ORANGE ORANGE ORANGE WHITE
239-2NN, BLACK 239-5Y, BLACK 239-3KK, BLACK 239-4CC, BLACK 239-1PP, BLACK
EE01-2, BLACK/WHITE
F E D
E22-1, PINK EE24-1, LtGREEN EE16-2, WHITE/RED EE10-1, BROWN/WHITE
CUMMINS S6
POWER
C A B D
B C A
E F
ENG_3 THROTTLE PEDAL CUMMINS
S5 SH 5 S4
S4
457-4B, BLACK
1
ENG13-A
239-14G, BLACK 239-15J , BLACK 30-7A, ORANGE 30-6A, ORANGE
576-1 , ORANGE 576-2 , ORANGE
577-1A, BLACK 577-2 , BLACK
BLACK BLACK ORANGE ORANGE
576-1B , ORANGE 576-2A , ORANGE
577-1B , BLACK 577-2A, BLACK
SH 5 SH 5
SH 5 SH 5
21 22
S2
S2
5
ENGINE STOP
4
2
525-1 , BLUE/RED 526-1 , BLUE/ORANGE
A B
SPEED SENSOR ENG CAB LOAD CENTER 16
33
15
A281-2A, WHITE
OEM HARNESS
3
SH 10
16 33 15 STOP ENGINE CHECK ENGINE WARNING ENGINE CUMMINS LIGHT BAR
533-1 , WHITE
BLUE RED ORANGE ORANGE
B
3-3 , WHITE
499-1 , A23-1 , 30-5A, 30-2A,
EE01-8, BLACK/WHITE
EE14-1, BLUE EE13-1, RED/ORANGE EE23-1, GREEN/BLUE EE12-1, BLACK/RED
577-1C, 577-2B, 30-2B , 576-1A ,
ENGINE ECU CUMMINS
PINK/BLUE YELLOW/BLUE BLACK/BLUE RED/ORANGE
SIGNAL
A C
EE13-2, RED/ORANGE
516-1 , 515-1 , 500-1 , 498-1 ,
RETURN
ENG13
458-1 , BLUE
533-1A , WHITE 457-5C , BLACK
ORANGE BLUE/RED BLUE/ORANGE RED/ORANGE
455-2 , RED
464-1 , WHITE
576-1 , 197-1 , 198-1 , 582-1 ,
SH 5
CAB61 CAB60
464-1A , WHITE
ENGINE ECU CAT
A
S3
CATERPILLAR CUMMINS ENGINE ECU/TPS/SPEED/SENSOR/INTERUPT/WARNING LAMPS PD8C3417.FRM
47
Model 387 Schematics (48 of 59)
SK30218 SPEEDOMETER MESSAGE CENTER
MESSAGE 1
2
A
CAB44
SH 53 SH 53
239-53C , BLACK
669, WHITE 670, LtGREEN
239-54D , BLACK
239-52B , BLACK 239-51B , BLACK 253-23C , LtBLUE 253-22A , LtBLUE 253-21A , LtBLUE
SH 52 SH 52
SMC SELECT/RESET 7
9
2B
3 1 6
5B 4 8
10
SPEEDO MESSAGE CENTER (SMC) PD8C3417.FRM
48
ABS ECU
DATA LINK A
SH 35
B C
ECU AUTO SHIFT XMSN 661-1E , YELLOW 662-1E , GREEN 663-1E , NONE BB2
C
B
A
C
B
A
BB4
663-1F , NONE 662-1F , GREEN 661-1F , YELLOW B
B B
DIAGNOSTIC INTERFACE CONNECTION A
C
C
A B C
C
C
B C B
A
A
B
A
A
B
A B
C
C
C
S4 B
S3
661-1G, YELLOW 662-1G , GREEN 663-1G, NONE
BB1 HDA3
B
C
J1939
A B
C
B C
C
239-2N , BLACK 230-2B , ORANGE 417-2A , PURPLE 418-2A , WHITE S2
A
S1
A
B A
B
A
C
A
C
239-1Q, BLACK 230-1D, ORANGE 417-1E, PURPLE 418-1E , WHITE 660-1 , NONE 662-1 , GREEN 661-1 , YELLOW
C
B
B
DATA LINK CONNECTION CENTER 661-1A, YELLOW 662-1A , GREEN 663-1A , NONE
B
A
A
ABS8 A
C
2
"A" REMOVE RESISTOR AUTO SHIFT ENG19
C
1 C
B
SH 35 A ENG4 ADD C
B
ABS10 ENG2 2 B
B
A
B B 1 A
A
A
INTERFACE MODULE A
239-63 , 230-7A , 417-3A, 418-3A ,
661 , NONE 662, GREEN 663 , YELLOW
ECU ENGINE
C
A CAB18
S10
BLACK ORANGE PURPLE WHITE
239-64 , BLACK 230-8A , ORANGE 417-4A , PURPLE 418-4A , PURPLE
CAB LOAD CENTER
B
DMC4 B
551-1 , BLUE/WHITE 552-1 , WHITE/BLUE
417-1F , PURPLE 418-1F , WHITE
417-2 , PURPLE 418-2 , WHITE
417-1B, PURPLE 418-1B , WHITE
CAB PANEL
A
A
EE33-1 , BLUE/WHITE EE35-1, WHITE/BLUE
417-1G, PURPLE 418-1G, WHITE
417-1A, PURPLE 418-1A , WHITE
CAB FIREWALL
X1-14, PURPLE X1-13, WHITE X1-3, ORANGE X1-1, ORANGE/BLACK
417-1C, PURPLE 418-1C, WHITE
417-1 , PURPLE 418-1 , WHITE
Model 387 Schematics (49 of 59) SK30218 A
A
S15
S14 A
C
B
A
B C
B
A B C
A B C
S12
660, NONE 662A, GREEN 661A, YELLOW
49
CAB FIREWALL
C
3 WAY J1939 JUNCTION
TERMINATION RESISTOR USED AT OPEN NODES
663-1A , NONE 662-1A , GREEN 661-1A , YELLOW
ABS8-A
ABS ECU
BB3 C
A
CONNECTS TO "A"
OPTIONAL AUTO SHIFT
PD8C3417.FRM
Model 387 Schematics (50 of 59)
SH 5
SK30218
B522-1 , RED/BLACK 1
86-1 30-1
85-1 87-1 87A-1
SH 5
B252-1C , RED/BLACK
3
4
5
6
RED RED RED RED
22
23
24
25
26
27
28
29
30
31
32
33
38
39
A252-3 , RED A252-2 , RED A252-1 , RED
239-7F , BLACK
ACCESSORY RELAY
2
252-1 , 226-9 , 226-8 , 226-7 ,
7
SPARE CONNECTIONS
50
S4
SPARE FUSE POSITION 304-10 , 304-9 , 304-8 , 252-4 , 252-3 , 252-2 ,
A
RED RED RED RED RED RED
226-6A , RED 226-5B , RED 226-4B , RED 8
86-2 30-2
9
10
11
12
85-2 87-287A-2
34
35
36
37
SPARE FUSE POSITION 14
40
41
42
43
44
45
SPARE CONNECTIONS
286-1D , RED
86-3
304-7 , 304-6 , 304-5 , 304-4 , 304-3A , 304-2 ,
RED RED RED RED RED RED
CAB39
298-11 , ORANGE 304-11 , RED 252-5 , RED 239-48 , RED
. S3
230-6 , ORANGE 230-5 , ORANGE 230-4A , ORANGE 15
16
17
18
19
20
46
47
48
49
50
2 3
MAIN POWER
4
SPARE FUSE POSITION
21
52
SPARE CONNECTIONS
CAB2
1
51
230-1E , ORANGE 230-2C , ORANGE 230-3B , ORANGE
239-2P , BLACK 239-3L , BLACK 239-4K , BLACK
85-3
239-JA , BLACK
87-3
298-10 , ORANGE
304-1 , RED 298-9 , ORANGE
SH 5
13
226-1J , RED 226-2D , RED 226-3D , RED
IGNITION RELAY
53
54
55
56
57
298-2 , ORANGE 298-3 , ORANGE 298-4 , ORANGE 298-5A , ORANGE 298-6 , ORANGE 298-7 , ORANGE
S2 298-1A , ORANGE
SH 5
S1 239-1R , BLACK
SH 4
CAB SPARE POWER SYSTEM EXPANSION
PD8C3417.FRM
CAB LOAD CENTER
Model 387 Schematics (51 of 59)
SK30218
A252-2A , RED 239-2CC, BLACK
RADIO/ CB HEADER
CBSP-1, WHITE/GRAY
A
CBSP-2, BROWN/GRAY
B
RED BLACK
BROWN/GRAY WHITE/GRAY
CB RADIO
LH ANTENNA
51
HDR10
A252-2A , RED 239-2CC, BLACK
CBSP-2A, BROWN/GRAY CBSP-1A, WHITE/GRAY
CBSP-2A, BROWN/GRAY CBSP-1A, WHITE/GRAY
CAB LOAD CENTER
A
RH ANTENNA CB RADIO
PD8C3417.FRM
CB SPEAKER
Model 387 Schematics (52 of 59)
SK30218
A
52
CAB LOAD CENTER CAB14 CAB PANEL 10
7
25 PIN SLEEPER 1
253-1P
253-24A
21
CAB53 CAB15 37 PIN HVACCAB FIREWALL RADIO/CB ENGINE DOOR PWR LIGHT BAR 7 C7 2 9 5 30 C8 4
HTD MIRROR SW
CAB30 FLOOR LP SWITCH
10
8
S1
9
15
CAB4310
SMC SELECT/RESET SWITCH
253-3E
253-3G
253-3H
253-4D
253-10C
6
6
4
2
G
DOOR4 RH POWER WINDOW
DOOR6 DOOR LOCK
DOOR4
DOOR5
RH POWER WINDOW
DOOR6
LH POWER WINDOW
DOOR LOCK
9
9
SLPR14
SLPR27
SLPR17
HVAC CONTROLREFER SWITCH FL LP SWITCH ON/OFF HEAD SLEEPER
9
ENG10
ENG9
ENG8
ENG7
ENG12
CRUISE ON/OFF SWITCH
CRUISE ENGINE BRAKEENGINE BRAKEDIAGNOSTIC SET/RESUME SELECTOR ON/OFF SWITCH SWITCH SWITCH SWITCH
9
CAB11
CAB12
CAB13
CAB11 HEAD LAMP SWITCH
CLEARANCE LP-SWITCH
PASS SIGNAL FOG LP SWITCH SWITCH
CAB16
253-13A 9
253-7A 9 CAB17
253-8A 9 CAB20
ENGINE SPOT LP FAN SWITCH SWITCH
CAB25
253-9B 9
9
CAB21
CAB22
EITHER SWITCH
SLEEPER LP SWITCH
BACK LIGHTING +12 VOLTS
253-15A
9
INNER AXLE SWITCH
253-25
CIGAR LIGHTER POWER
9
253-5
CAB24 253-10C
253-2E, LtBLUE
DMC5
9
253-4B
9 CAB23
9
9
253-3D
DIFF LOCK SWITCH
253-12A
253-5
9
9 SH 35
253-4
9
253-2G
253-1J , LtBLUE
1
253-3
CAB28
TWO SPEED AXLE SWITCH S6
253-2
9
253-16A
253-2H 6
253-2K
S4
253-1
CAB37 CIGAR LIGHTER POWER CAB30
SLEEP L/C SLPR2
253-11A
1
9
1
LIGHT BAR
253-21
CAB38 DMC6
253-18 PIN
30
DOOR4 DOOR4
253-1N
253-20A
WHT
RED
253-19 PIN
8
DOOR6
253-22 253-23
9
DOOR3 DOOR3 8
PANEL LP DIMMER CONTROL
253-3F
253-4C
8 HVAC CNTRL HEAD
253-1R
1 2 3
G
253-1Q
1 2 3 CAB19
253-2J
253-1M
253-6
13-1
S3
FIFTH WHEEL SW SWITCH 253-14 9 CAB26 SPARE SWITCH 9 CAB27 DIFF LOCK PTO SWITCH
A CAB62 ASHTRAY
PD8C3417.FRM
9 CAB45 LOAD LP SWITCH
Model 387 Schematics (53 of 59)
SK30218
CAB 2
1 CAB10
65 CAB1
1 CAB36
1 CAB35
8 CAB31
LH FLOOR LAMP
C CAB48 HVAC CONTROL HEAD
239-56C, BLACK
8 CAB32
D CAB52 AC MODULE
C CAB50 HVAC CONTROL HEAD
239-57A , BLACK
8 7 2 D
SH 4
RHFLOORLAMP
8 7 2
CAB43
CAB47 HVAC CONTROL HEAD
239-55B , BLACK 239-54B , BLACK
2 CAB46 HVAC CONTROL HEAD
239-42A , BLACK
7 8 CAB30 FLOORLAMP SWITCH
239-44A , BLACK 4 CAB39
239-59A , BLACK
S8
239-41A , BLACK
239-43A , BLACK
239-39A , BLACK 239-40A , BLACK
239-60A , BLACK
239-52 , BLACK 239-53 , BLACK
239-62A , BLACK
CAB FIREWALL 12
239-45A , BLACK
239-46A , BLACK
239-47B , BLACK
239-48B , BLACK
239-3DD, BLACK 239-4Y, BLACK
CAB45
SELECT/RESET SWITCH
LOAD LAMPSWITCH
CABLOADCTR WIPER SWITCH PASSTHRU
CAB16 FOGLAMP SWITCH
8 7 3
7 CAB21
CAB17 ENGINEFANSWITCH
CAB20 STOP LAMP SWITCH
239-51 , BLACK 239-38A , BLACK
239-29B , BLACK
239-28A, BLACK
CAB13 PASS SIGNAL SWITCH
239-25D, BLACK 239-26C, BLACK 239-27B, BLACK
CAB12 CLEARANCE LAMPSWITCH
8 7
239-22C, BLACK
239-19B, BLACK 239-20B, BLACK
8 7 3
239-21A, BLACK
239-15F , BLACK 239-16D, BLACK 239-17C, BLACK 239-18C, BLACK 8 7 3 5
239-23A , BLACK
CAB11
239-13F , BLACK 239-14F , BLACK
WIRE1724, BLACK
8 7 3 HEADLAMP SWITCH
8 7 3 5
239-12K, BLACK
239-9J , BLACK 239-10H, BLACK
239-8R, BLACK
B
C
CAB14 CAB LOAD CENTER 3
239-37A , BLACK
239-2DD, BLACK
OUTLET 4
2 3 5
7
14
21
EITHERSWITCH
PARK BRAKESWITCH
DIFF/LOCK/PTOSWITCH
239-50A, BLACK 239-32B, BLACK C
A
CAB23
S5
CAB41 RHDOORSWITCH
TWOSPEEDAXLESWITCH
239-51A , BLACK
239-30A , BLACK 7
CAB29
CAB28
CAB22
SLEEPERFLOOR LAMPSWITCH
239-33A , BLACK
HDA1
239-2EE, BLACK
E
A HDA2
CAB25 SPARESWITCH
239-35A , BLACK C
8 7 2 CAB26
13 CAB15 CAB LOADCENTER
239-1GG, BLACK 1 ENG11 CAB LOADCENTER
CAB43 SELECT/RESETSWITCH
SPARESWITCH
239-3EE, BLACK 8 7 ENG10
CRUISEON/OFFSW
239-4Z , BLACK
7 ENG9 SET/RESUMESWITCH
239-5W, BLACK 7 ENG8
ENGBRAKE SELECTOR SW
239-36A, BLACK C
239-7P, BLACK 8 7
ENG7 ENGINEBRAKEON/
7 ENG12
A CAB27
CAB42
SPARESWITCH
LHDOOR SWITCH
239-65 , BLACK B CAB62 ASHTRAY
DIAGNOSTICSWITCH
PD8C3417.FRM
239-55C, BLACK 239-53B , BLACK
C
239-54C, BLACK
DIAGNOSTIC CONNECTION
239-34A , BLACK
NEGATIVE SWITCH LINKS
239-6Q, BLACK
E CAB56
239-2FF , BLACK
239-63A , BLACK
239-52A , BLACK 239-53A , BLACK
CAB24
S10
239-49A , BLACK
C INTERAXLESWITCH
239-64A , BLACK
239-6P , BLACK 86-2
85-3
239-8P , BLACK 86-2
86-1
HVAC
CAB CAB LOAD CENTER LOAD CENTER CAB54 CAB15
239-58A , BLACK
239-1FF , BLACK
LOAD CENTER CAB53
S1
CABLOADCENTER
53
CAB
SH 4
239-5V, BLACK
A
8 7 2 CAB45 LOADLAMPSWITCH
Model 387 Schematics (54 of 59) (GREEN/BLACK) SH 10 227-3A
LOAD CENTER CHASSIS
S6
SH 10
227-2B
227-4A
SH 10
SH 10
227-1F
227-5A
SH 13
SK30218
SH 50
252-1A
SH 50
252-2A
SH 50
252-3A
(RED) 252-4A S4 253-5A
(YELLOW/BLACK) SH 13 228-5A S5 SH 10 SH 10
228-4A
228-2B
228-3A
228-1F SEE GROUND DISTRIBUTION SHEET
SH 47
557-2
SH 17
239-11E
SH 4
239-1S
S2
SH 10 SH 10
(BLACK) 577-1
SH 47
239-17
SH 4
239-15B
SH 4
SH 4
239-10D
239-3N
SH 22
SH 3
239-6G
239-4L
SH 4
SH 13
A239-LH
SH 12
8-5C
SH 12
8-1D
SH 12
8-2C
SH 6
SH 6
SH 40
SH 50 SH 50 SH 50 SH 50
(RED) 397-2
SH 6
226-11A
(RED) 226-12A
SH 40
226-13A
SH 40
226-14A
SH 39
SH 50
230-7
(ORANGE) S12 SH 49 230-8 (BLACK) 239-47A
239-1T
SH 50
239-2Q
SH 50
239-3P
SH 50
239-4M
SH 5
239-48A
SH 50
239-5J
SH 50
SH 25
239-49B
(BLACK) 239-38B
239-50B
239-34B
SH 52
253-14A
SH 52
253-11B
SH 52
253-16B
SH 39
(ORANGE) 298-3A
SH 50 SH 50
298-5B
298-11A 298-2A 298-9A
298-6A
SH 50
298-7A
SH 50
(RED) 304-4A
SH 50
304-5A
SH 50
304-10A
SH 50
304-11A
304-7A
SH 50
SH 50
304-2A
304-8A
SH 50
304-9A
SH 50
S3
304-6B
304-3B
SH 49
239-64B
SH 25
329-1C
(BLACK) S10 239-63B
SH 9
342-1A 342-2A
239-35B
SH 39
239-32D
239-36B
SH 40
SH 40
239-33D
239-37B
SH 39
SH 48
239-51C
S5
SH 39
SH 13
239-6H
SH 12
239-7G
SH 13
239-10E
SH 12
239-9D
SH 14
SH 9
342-3A
SH 49
417-3
418-3
570-2A
SH 21
FRL-1A
SH 21
FRL-4A
SH 21
239-42B
SH 21
239-43B
SH 12
SH 16 SH 23
SH 14
239-8F
SH 25
SH 9
SH 49
SH 49
(BLACK)
S3
(PURPLE) SH 14 7-1B 7-2C
SH 14
(BROWN) 8-1E
SH 12
8-2D
SH 12
(BROWN) 8-5D
SH 12
8-6A
SH 12
S4 8-4D
230-1F
SH 43
230-5A
SH 24
239-3S
SH 24
239-4P
SH 43
239-6J
SH 43
253-4F
SH 23
253-2S
SH 43
S8
SH 4
(BLACK) 239-35
S5
SH 34
239-18A
SH 46
239-19
SH 46
298-1C
SH 46
298-2B
SH 46
298-4B
SH 46
304-9B
SH 46
239-32A
SH 46
SH 46
298-6B 298-8 (RED) 304-1B
S4
304-3C
SH 23
253-1V
SH 23
S4
304-7B
SH 4
S2
(BLACK) 239-4Q
SH 17
S1
(BLACK) 239-6K
SH 17
S5
(BLACK) 239-15C
SH 6
S3
(BLACK) 239-8H
SH 17
239-13C
SH 46
239-9E
SH 46 SH 46
(BLACK) S10 239-16B
SH 4
(BLACK) 239-11G
SH 4
239-14C
SH 46
SH 46
SH 43
239-7H
SH 34
305-6
(BROWN/YELLOW) SH 43 302-1B
CHASSIS HARNESS (BLACK) S4 239-1W
SH 34
SH 46
SH 24
(LtBLUE) 253-3B
S3
239-5M
(ORANGE) SH 46 298-5C S3
SH 24
SH 24
S2 239-26B
SH 23
(ORANGE) 230-2D
239-2T
239-19 239-34 (BLACK) 239-25B
SH 23
226-3E
230-3C (BLACK) S1 239-1V
239-3T
SLEEPER HARNESS
SH 34
302-3A
S2
SH 25
19-2C (RED) 226-2E
302-2A
S5
(YELLOW/WHITE) S16 SH 9 570-3A SH 9
226-1K
SH 24
SH 50
(YELLOW/WHITE) SH 9 342-4A
S9 SH 2
239-10F
SH 11
269-1B
(PINK/WHITE) S8 SH 11 269-2A 269-3A
SH 11
(BROWN) 8-2E
SH 12
8-1F
SH 12
(BROWN) 8-4F
SH 12
8-5E
SH 12
ABS CAB SH 36/37
GND-AAA
SH 36/37
X5-3
(RED/BLACK) S9 SH 21 FRL-3A
(BLACK) S8 239-41B
239-4N 239-5K
SH 25
S2
8-3D
239-17A
(WHITE) S14 418-4
SH 17
S6
SH 46
(PURPLE) S15 417-4
239-3R
DOOR CONTROL (VIOLET/WHITE) S5 SH 25 19-3B 19-1E
S1
7-3C
(PINK/GREEN) S11 SH 25 329-2C
342-5A
SH 17
239-12C
239-16A
S13
(BLACK) 239-2R
(BLACK)
SH 46
329-3C
SH 40
239-30B
239-1U 239-11F
SH 49
570-4A
SH 40
SH 4 SH 10
SH 50
SH 13
SH 20
239-39B
253-12B
SH 50
SH 9 SH 25
SH 52
304-1A
SH 49
S1
SH 52
253-15B
SH 50
SH 9 SH 49
(LtBLUE) 253-13B
298-4A
298-10A
SH 12 SH 12
SH 50
S7
298-1B
SH 50
S2
SH 13
397-1
226-10
SH 50
SH 13
MAIN CAB HARNESS SH 40
253-21B
239-14H
8-4C
S7
253-10
SH 52
A239-RH
(BROWN) S3 8-3C
397-3
SH 52
S6
HOOD HARNESS SH 50
A
SH 36/37
GND-BA
SH 36/37
X4-12B
S1
(GREEN/YELLOW) SH 36/37 X3-9B X4-3B
S2
(GREEN/YELLOW) SH 36/37 X2-3B X5-12
8-3F
S6
SH 36/37
SH 36/37
S7
SH 21
SPLICE LOCATION DISTRIBUTION PD8C3417.FRM
54
Model 387 Schematics (55 of 59)
SK30218
COWL SH 7
239-3V
SH 6
239-4R
SH 8
239-5P
(BLACK) S1 239-1X 239-2U
CUMMINS ENGINE SH 6
SH 47
SH 6
SH 25
DOOR RH (BLACK) S2 239-1Y 239-3W
SH 23
SH 43
239-2V
239-4S
SH 24
239-5Q
SH 25
253-1W
253-3M
SH 24
SH 4
239-10G
SH 5
239-13
LOCK2A-1B
SH 47
30-4
SH 47
30-6
226-5C
226-2F
SH 21
226-3F
SH 23
(BLACK) 239-1Z
SH 24
SH 43
239-2W
SH 25
239-3X
239-5R
SH 24
SH 24
239-4T
239-6L
SH 24
239-7K
SH 43
253-1X 253-2U
S4
665-2A
(LtBLUE) 253-3N
SH 24
253-4G
SH 24
(WHITE/TAN) S2 SH 43 665-1C 665-3A
SH 4
239-4F
SH 5
239-13
S1 239-1DD 239-3BB
SH4 SH 4
S2 239-5T
239-12H
SH 11
SH 55
239-9G
239-6N
SH 9
239-13E
SH 44
SH 8
239-10M
239-7M
SH 11
S4 457-1B
SH 44
457-8A
SH 44
S3 457-5A
SH 47
(BLACK) S4 239-2X
SH 44
SH 47
(BLACK) S1 239-7L
239-8K
457-7A
SH 47
SH 4
SH 41
457-4
SH 41
457-2
SH 4
(ORANGE) S5 SH 47 30-1 SH 47 30-7 (ORANGE) S6 SH 47 30-2 SH 47
SH 44
ENGINE DASH (BLACK) S1 EE01-1A EE01-3A
SH 44
SH 47
EE01-2A
SH 47 (CAT ONLY)
SH 12
SIDE REPEATER (BROWN) S1 8-1G 8-2F
EE01-8A
8-3G
SH 4
SH 4 SH 43
239-2AA
SH 44
30-5 SH 23
(ORANGE) S3 SH 24 230-1G
S5
SH 47
SH 4
SH 9
239-8J
SH 24
SH 23
SH 23
239-6M
30-3
226-4C
SH 23
SH 4
SH 47
SH 23
230-3D
SH 47
SH 24
(RED) S1 226-1L
SH 24
CAT ENGINE SH 47
SH 24
LH DOOR
230-2E
S2 239-11H
239-5S
(BLACK/GRAY) S3 SH 24 LOCK2A-3A LOCK2A-2A
SH 24
239-15D
SH 23
(GRAY/BLACK) S4 LOCK1A-1A LOCK1A-3A SH 24 LOCK1A-2A
SH 24
(BLACK) S3 239-1AA 239-3Y
SH 47 SH 25
239-14E
239-4U
(LtBLUE) S1 253-2T
A
239-1BB
SH 12 SH 12
(BLACK) S2 239-2Y
SH 10
239-3Z
SH 10
TRAILER HARNESS 7-WAY (BLACK) S1 239-2Z 239-1CC 239-3AA
SH 4 SH 4
SH 43
SPLICE LOCATION
DISTRIBUTION PD8C3417.FRM
55
Model 387 Schematics (56 of 59)
SK30218
A
S6
253-25A , LtBLUE 239-65A , BLACK
S5
A
B
CAB62
ASH TRAY
ASHTRAY PD8C3417.FRM
56
Model 387 Schematics (57 of 59)
SK30218
A
57
ICC LIGHT HDR2 THRU HDR6
DOME LAMPS HDR7, HDR8, AND HDR9
SPOT LAMPS HDR12, HDR12
AXLE GROUND AND TEMP SENSOR CONNECTION TAIL LAMP CONNECTION CHASS11
SPARE CIRCUIT BLOCK CAB2 FIREWALL CONNECTION CAB1/CLC7
GROUND STUD FIREWALL CLC 9
RH HEAD LAMP CONNECTION HOOD 3
ENGINE HARNESS CONNECTION CLC2/ENG3
SWITCHES ON DASH CAB 11 THRU CAB 22
LH FUEL TANK CONNECTION HOOD 12 STOP LAMP SWITCH CONNECTION HOOD 14
POWER OUTLET CONNECTION HOOD HARNESS CONNECTION HOOD 1/CLC1 LH HEAD LAMP CONNECTION HOOD 2 PD8D3417.FRM
Model 387 Schematics (58 of 59)
SK30218
A
READING LAMP CONNECTION FL LAMP CONNECTION
LOAD LAMP CONNECTION READING LAMP CONNECTION
POWER OUTLET
CONTROL PANEL CONNECTION BUNK LAMP CONNECTION MAIN POWER CONNECTION
REFRIGERATOR CONNECTION SLPR15 OR SLPR16
SPARE CIRCUIT CONNECTION
PD8D3417.FRM
58
Model 387 Schematics (59 of 59)
SK30218 7
A
9
2B 3 1 6 5B 4 8 10
CIRCUIT BREAKER 60 AMPS
HOT LINE SWITCH 6 10 8 9 4
226-1AB , RED 239-1AB , BLACK 383-1 , BLUE
1
1
1A, RED
239-2AB , BLACK
HTL2
383-2 , BLUE
2
2
253-2AB , LtBLUE
1 2 7 3 5
239-3AB , BLACK 253-1AB, LtBLUE
HTL1
CAB SPARE POWER 5 AMPS
HTL3 1
1, RED
SH3
HTL4 1
BACK LIGHTING
239-1AC , BLACK 383-1AB , BLUE
86 30
SOLENOID
239-AE , BLACK
87 85
HTL1-SC1
1
A B A B
HTL1-SC2
HOT LINE HEATER 383-1AC , BLUE 239-1AD , BLACK
2
CROSS MEMBER
FUEL HOT LINE PD8D3417.FRM
59
