1970-1997 Peterbilt 357, 375, 377, 378, 379 Electrical Wiring Diagrams Manual

TITLE SH NO. 1) INDEX 2) HARNESS ARCHITECTURE 3) LOCATION OF MAJOR COMPONENTS 4) LOCATION OF MAJOR COMPONENTS 5) SYMBOLS INDEX 6) SYMBOLS INDEX ( CONTINUED ) 7) SYMBOLS INDEX ( CONTINUED ) 8) SYMBOLS INDEX ( CONTINUED ) 9) CHARGE AND START 10) POWER DISTRIBUTION - UNSWITCHED CIRCUITS 11) POWER DISTRIBUTION - IGNITION SWITCHED CIRCUITS 12) POWER DISTRIBUTION - ACCESSORY SWITCHED CIRCUITS 13) POWER DISTRIBUTION - CIRCUIT BREAKER - ENGINE 14) TURN SIGNALS / HAZARD LIGHTS 15) STOP LAMPS 16) MARKER / CLEARANCE LAMPS / LEFT POLE / RIGHT POLE 17) HEADLAMPS 18) BACK - UP LIGHT SWITCH 19) DAYCAB AD / LOADLIGHTS 20) SLEEPER AD / LOADLIGHTS - 48" / 63" HIGH ROOF 21) FOG LIGHTS 22) CAB DOOR LOCKS 23) REMOTE KEYLESS ENTRY RELAY - OPTIONAL 24) CAB DOME LIGHT / DOOR LAMPS / DOOR JAMB / ALARM 25) CAB FOOTLIGHTS / CIGAR LIGHTER / POWER POINT / B - PANEL POWER POINT 26) 48" / 63" HIGH ROOF SLEEPER LIGHTS / DOOR LOCK / DOOR JAMB 27) 48" / 63" HIGH ROOF SLEEPER POWER ACCESS OUTLETS 28) 48" / 63" LOW ROOF SLEEPER 29) 70" SLEEPER 30) 36" SLEEPER 31) LH DOOR ELECTRIC WINDOW LIFT 32) RH DOOR ELECTRIC WINDOW LIFT 33) MIRRORS - STANDARD / MOTORIZED / HEATED AND MIRROR CONTROL 34) CB RADIO 35) DASH RADIO 36) CAB ROOF SPEAKERS - CONCERT CLASS / CONCERT CLASS PREMIUM 37) CAB ROOF SPEAKERS - CONCERT CLASS EHD 38) RADIO - 48" / 63" / 70" SLEEPER 39) CLOCK 40) WIPER / WASHER 41) ELECTRIC HORN 42) CAB HVAC 43) SLEEPER HVAC - ALL SLEEPERS 44) SLEEPER LOAD CENTER 45) SLEEPER POWER SUPPLY HARNESS 46) NAMUX 47) BACK - LIGHTING ( +12 VOLTS ) AND PANEL LAMPS DIMMER 48) BACK - LIGHTING NEGATIVE LINKS ( GROUND ) 49) OUTSIDE AIR TEMPERATURE 50) FIFTH WHEEL / DIFF LOCK / SUSPENSION DUMP VALVE / SPARE ROCKER SWITCHES 51) FUEL LEVEL 52) FUEL FILTER - ACCESSORY POWER 53) PARK BRAKE 54) FORWARD AND REAR DRIVER AXLE TEMP 55) VORAD 56) AIR DRYER 57) FUEL FILTER RESTRICTION 58) TIRE PRESSURE CONTROL SYSTEM ( TPCS ) CAB & CHASSIS 59) AUX TRANSMISSION OIL TEMP 60) EATON ULTRASHIFT TRANSMISSION 61) EATON AUTOSHIFT TRANSMISSION 62) EATON AUTOSHIFT AND ULTRASHIFT TRANSMISSION ( CONTINUED ) 63) MERITOR FREEDOMLINE TRANSMISSION 64) WTEC TRANSMISSION ( ALLISON ) 65) WTEC TRANSMISSION ( ALLISON ) ( CONTINUED ) 66) EATON LIGHTNING TRANSMISSION POWER 67) MAIN CAB ABS CONNECTIONS 68) BENDIX ABS SYSTEM 69) BENDIX ABS SYSTEM ( CONTINUED ) 70) BENDIX ABS ( CHASSIS ) 71) WABCO ABS SYSTEM ( E-BASIC ) 72) WABCO ABS SYSTEM ( E-UNIVERSAL ) 73) TRAILER ABS 74) MAIN CAB ENGINE FIREWALL BULKHEAD 75) ENGINE - CAT C11 / C13 AND C15 76) ENGINE - CAT C11 / C13 AND C15 ( CONTINUED ) 77) ENGINE - CUM ISM 78) ENGINE - CUM ISC / ISL 79) ENGINE - CUM ISX 80) ENGINE - CUM ISM ( BJ SERVICES ) 81) ENGINE - CUM ISM ( BJ SERVICES ) ( CONTINUED ) 82) ENGINE - CUM ISM ( BJ SERVICES ) 83) ENGINE - CUM ISM ( BJ SERVICES ) ( CONTINUED ) 84) ENGINE - CUM ISX ( BJ SERVICES ) 85) ENGINE - CUM ISX ( BJ SERVICES ) ( CONTINUED ) 86) ENGINE ECU POWER 87) CHASSIS SPARE GROUNDS 88) MAIN CAB SPARE RELAY 89) CHASSIS SENSOR ADD-ON - TRANSFER CASE OIL TEMP / BRAKESAVER OIL TEMP / GENERAL OIL TEMP / AUX XSMN OIL TEMP # 3 / PTO OIL TEMP 90) CUMMINS ICON2 IDLE CONTROL 91) J1939 ARCHITECTURE 92) TELEMATICS 93) SLEEPER LVD / LVD ADAPTER 94) CUMMINS DUAL STATION CONTROLS ( BJ SERVICES ) 95) ENGINE BRAKE CONTROLS 96) ENGINE FAN CONTROLS 97) LIFT AXLE CONTROL ( W/O AUTO-REVERSE ) 98) LIFT AXLE CONTROL ( W/ AUTO-REVERSE ) Schematic - 379 Model Family Electrical P94-6023 C 01

MAIN CAB HARNESS DASH PANEL HARNE SSES ( A , B , C ) POWERTRAIN ENGINE HARNESS TRANSMISSION HARNESS TRAILER HARNESS CHASSIS HARNESS TAIL LAMP HARNESS FIREWALL HARNESS JAKE BRAKE HARNESS ABS DASH HARNESS ABS CHASSIS HARNESS HOOD HARNESS ROOF HARNESS SLEEPER HARNESS VORAD CAB HARNESS VORAD CHASSIS HARNESS SLEEPER HVAC SYSTEM CAB HVAC SYSTEM HARNESS ARCHITECTURE TELEMATICS ENGINE FAN HARNESS DOOR HARNESS Schematic - 379 Model Family Electrical P94-6023 C 02

SCALE 1:8 FUSE BLOCK J1587 DATA BUS CONNECTOR RELAY ASSEMBLY ( OPTIONAL ) ANTENNA MULTIPLEXER AUDIO AMPLIFIER ( OPTIONAL ) GPS ANTENNA ( OPTIONAL ) SCALE SLEEPER LOAD CENTER SLEEPER LOW VOLTAGE DISCONNECT ( OPTIONAL ) LOW VOLTAGE DISCONNECT ( OPTIONAL ) ABS ELECTRONIC CONTROL UNIT INSTRUMENTATION CONTROL UNIT MODULE REMOTE KEYLESS ENTRY MODULE MIRROR CONTROL MODULE ( OPTIONAL ) VORAD ECU ( OPTIONAL ) GPSNET MODEM ( OPTIONAL ) ( OPTIONAL ) LOCATIONS OF MAJOR ELECTRICAL MODULES IN 379E CAB AND SLEEPER TURNSTALK MODULE FIREWALL CONNECTOR - HOOD AND TRAILER HARNESS FIREWALL CONNECTOR - ENGINE AND CHASSIS HARNESS ENGINE HARNESS FIREWALL CONNECTOR ABS HARNESS FIREWALL CONNECTOR LOCATION OF MAJOR COMPONENTS Schematic - 379 Model Family Electrical P94-6023 C 03

SCALE 1:6 SCALE 1:16 FUSE BLOCK AUDIO AMPLIFIER GPSNET MODEM ( OPTIONAL ) ( OPTIONAL ) ABS ELECTRONIC CONTROL UNIT RELAY ASSEMBLY SLEEPER LOAD CENTER SLEEPER LOW VOLTAGE DISCONNECT ( OPTIONAL ) NOTE: IN 36" SLEEPER, LOAD CENTER IS MOUNTED ON FRONT WALL IN 70" SLEEPER, LOAD CENTER IS MOUNTED UNDER BUNK CAB REAR VIEW REAR WALL AND BULKHEADS NOT SHOWN } CAB LEFT SIDE VIEW SLEEPER LEFT SIDE VIEW SLEEPER REAR VIEW REAR WALL AND BULKHEADS NOT SHOWN ABS ELECTRONIC CONTROL UNIT MIRROR CONTROL MODULE ( OPTIONAL ) REMOTE KEYLESS ENTRY MODULE ( OPTIONAL ) GPSNET MODEM ( OPTIONAL ) VORAD ECU ( OPTIONAL ) ANTENNA MULTIPLEXER ( OPTIONAL ) J1587 DATA BUS CONNECTOR LOCATIONS OF ELECTRICAL MODULES IN 379E CAB AND SLEEPER TURN STALK MODULE TURN STALK MODULE ENGINE HARNESS FIREWALL CONNECTOR ABS HARNESS FIREWALL CONNECTOR ( OPTIONAL - PROPOSED LOCATION) ( OPTIONAL - PROPOSED LOCATION ) J1939 CONNECTOR ANTENNA MULTIPLEXER ( OPTIONAL ) ( OPTIONAL ) VORAD ECU REMOTE KEYLESS ENTRY MODULE ( OPTIONAL ) MIRROR CONTROL MODULE ( OPTIONAL ) FIREWALL CONNECTORS FUSE BLOCK LOW VOLTAGE DISCONNECT ( OPTIONAL ) J1587 DATA BUS CONNECTOR INSTRUMENTATION UNIT CONTROL MODULE CLOSET WALL INSTRUMENTATION CONTROL UNIT MODULE LOW VOLTAGE DISCONNECT ( OPTIONAL ) RELAY ASSEMBLY AUDIO AMPLIFIER ( OPTIONAL ) FIREWALL CONNECTOR HOOD AND TRAILER FIREWALL CONNECTOR ENGINE AND CHASSIS ENGINE HARNESS FIREWALL CONNECTOR ABS HARNESS FIREWALL CONNECTOR GPS ANTENNA GPS ANTENNA DIAGNOSTIC CONNECTOR J1939 CONNECTOR DIAGNOSTIC CONNECTOR LOCATION OF MAJOR COMPONENTS OPTIONAL FEED-THROUGH FOR AUTOMATIC TRANSMISSION VORAD DUAL STATION RH FIREWALL FEED-THROUGH Schematic - 379 Model Family Electrical P94-6023 C 04

SYMBOLS INDEX 20) STARTER THERMAL OVERLOAD SWITCH 21) NEUTRAL START SWITCH 22) BATTERY 23) ALTERNATOR 24) CIRCUIT BREAKER 25) STARTER SYMBOL / ABBREVIATION KEY 1) STUD 2) SPLICE 3) RING TERMINAL CONNECTORS 4) NUMBERS EX CIRCUIT DESCRIPTION SUFFIX ALPHA 286 -1 A 5) BUSS BAR 6) CB CIRCUIT BREAKER 7) CLC CHASSIS LOAD CENTER 8) SLPR SLEEPER 9) TRLR TRAILER 10) MFTS MULTI-FUNCTION TURN STALK 11) CONTINUED TO OTHER SH XX 12) MOMENTARY CONTACT CONTACT 13) BULB 14) GROUND 15) DIODE 16) RESISTOR 17) CAPACITOR 18) POLYFUSE 19) LIGHT-EMITTING DIODE NA NA SHEET NUMBER SWITCH 26) WINDOW SWITCH STARTER + S BATTERIES B- G D+ W/L B+ POSITION 1 POSITION 0 POSITION 2 1 3 2 4 6 5 1 3 2 4 6 5 1 3 2 4 6 5 CB2-2 150 AMP CIRCUIT BREAKER SW21-5 SW20-2_c0 Schematic - 379 Model Family Electrical P94-6023 C 05

27) J1939 CABLE SHIELD 28) TWISTED PAIR SYMBOLS INDEX ( CONTINUED ) 29) PRESSURE SWITCH 30) LAMP 31) LIGHT 32) IGNITION SWITCH 33) WINDOW LIFT MOTOR 34) TWISTED TRIPLET M 1 0 3 6 2 Schematic - 379 Model Family Electrical P94-6023 C 06

FUSES 1) 2) 3) 4) 5) 6) SYMBOLS INDEX ( CONTINUED ) LOAD LIGHT CLEARANCE LIGHT TRAILER LIGHT SPOT LIGHT FOG LIGHT BEACON / STROBE HEADLIGHT FUEL SELECT FUEL HEAT CRUISE SELECT REMOTE THROTTLE REMOTE THROTTLE OVERRIDE ENGINE DIAGNOSTIC ENGINE FAN RANGE SELECT PTO CRUISE ON / OFF ATC SLEEPER FLUORESCENT TRAILER AUXILIARY BRAKESAVER HAZARD TRANSMISSION RETARDER REAR A / C INSTRUMENT DIMMER AUXILIARY SIDE LAMPS DECK POWER FLASHING SIDE LAMPS OFFROAD ABS WINDOW LIFT DOOR LOCKS LIFTABLE TAG AXLE LIFTABLE PUSHER AXLE DIFFERENTIAL LOCK TRAILER DUMP TRAILER DUMP ROCKER SWITCH ICONS ENGINE BRAKE 25 A FUSE XX AMP F1_0 AMP XX XX XX XX XX XX XX XXX XXXX FUSE 10 AMP XX AMP Schematic - 379 Model Family Electrical P94-6023 C 07

RELAYS 1) 2) INTAKE AIR HEATER RELAY 3) 4) 5) SYMBOLS INDEX ( CONTINUED ) 6) 7) STARTER RELAY ENGINE INTERRUPT RELAY 8) ENGINE INTERRUPT RELAY START ENABLE RELAY 9) START ENABLE RELAY BACKUP LAMP RELAY 10) BACK-UP LAMP RELAY 11) RELAY 86 87 87A 30 85 R18-A K18-01 87A 30 85 87 86 R10-1 86 87 87A 30 85 R11-1 c K03-1-1 87A 86 85 30 87 J78-1 87A 87 86 30 85 XX 87A 87 86 30 85 R1 C LATCHING RELAY C X XX A B C DE F XX 85 30 87A 87 86 85 30 86 87 87A c Schematic - 379 Model Family Electrical P94-6023 C 08

START INTERRUPT IGNITION SWITCH FIREWALL STARTER RELAY NEUTRAL START OCP STARTER SOLENOID SWITCH ALTERNATOR WHT3110-64 WHT3110-69 WHT3110-69 BLK3911-5 BLK3911-5 GRA3391-0 RED3920-2 RED3920-1 RED3920-3 WHT3110-40 ENGINE GROUND ENG RUN POWER INTERUPT START / CHARGE RED BLACK WHT3110-42 T4 CAB WHT3110-41 ORN1250 ORN1250-1 ORN1250-2 ORN3912-3 ORN3912-1 ORN3912-4 ORN3912-5 ORN1910-3 ORN1910-4 RED1210-89 RED1210-91 RED1210-90 PWR DIST CENTER MAIN CAB POWER AMMETER SENSOR GRA3391-0 OPTIONAL OPTIONAL CHARGE AND START OPTIONAL JUMP START TERMINAL LOCATIONS: UNDER HOOD - LOCATED AT THE STARTER BATTERY BOX - LOCATED AT THE BATTERY T4 T7 T2 T3 T1 T5 ELEC ENGINE FIREWALL CB2 ORN3111-2 ORN3111-1 ECM SWITCHED POWER CB2 IGN BATT FEED SEE ENGINE SECTIONS OR 100 AMPS + 70 AMPS W/ SLEEPER W/O SLEEPER STARTER RELAY COIL WHT3110-4 SEE ELECTRONIC ENGINE FIREWALL CONNECTOR P103 ( PIN 21 ) ( FOR ALL ENGINES ) STARTER ORN3912-2 MATING CONNECTOR: ORN1230 ( SH 75-85 ) ORN1230 WHT3110-64 SEE SH 75-85 WHT3110-42 T6 OR 270 AMP POWER DIST CENTER ( HIGH AMP ALTERNATOR ONLY ) RED3920-11 NOTE: ALTERNATOR POSITIVE ( T1 ), POWER DIST CENTER ( T2 ), ALTERNATOR GROUND ( T3 ), AND ENGINE GROUND ( T5 ) ARE NOT USED WITH THIS ALTERNATOR OPTION. RED1210-88 RED3920-11 T9 ENGINE GROUND ( HIGH AMP ALT ONLY ) WHT3110-44 WHT3110-44 HIGH AMP ALTERNATOR OPTIONAL RED3920-0 RED3920-0 LVD V ( OUT ) LVD V ( IN ) RED1210-40 RED1210-40 RED1260-30 ORN1910-8 ORN3940-2 CB1 ENGINE SPARE 1 IGN BATT FEED SH 74, REFDES J50-6, NODE 10 SH 12, REFDES F1A-1, NODE 1 SH 11, REFDES S43, NODE 1 SH 10, REFDES S80, NODE 1 P8-1 C 50 AMP J51-1 1 P51-1 1 T10 1 50 AMP S111-1 J50-3 21 S101 50 AMP SW21 SW20 IC1 J4-1 A B C P2 5 6 1 4 2 3 BATTERIES 1 0 3 6 2 S52 S54-1 50 AMP S51-1 J3 1 P3 1 S3 S2-1 50 AMP S1-1 B- G D+ W/L B+ ENG22 A B STARTER + S P2-5 A B J3-2 A B 87A 87 86 30 85 J1-10 85 86 87A 87 30 J2-4 A B P110 B A P103-1 10 J50 10 J28 1 P18 1 Schematic - 379 Model Family Electrical P94-6023 C 09

LVD V ( OUT ) LVD V ( IN ) WHT0710-10 WHT1500 FB8C SPARE POWER CONN FB1 SPARE BATT PWR F1B-1 F2B-1 F3B-1 F4B-1 F5B-1 F6B-1 POWER DISTRIBUTION- UNSWITCHED CIRCUITS FIREWALL ENGINE CAB RED1260 RED1260 RED1260-7 RED0790-1 RED0790-2 RED0790-3 RED1260-9 RED1260-11 RED1210-23 RED1210-22 RED1210-27 RED1210-11 RED0710-1 RED0710-2 RED0710-3 RED1210-13 RED1210-13 RED1210-14 RED1210-14 FB6 FB5 MAIN ACC RELAY RED1260-8 RED1260-8 FB3 RED2990 RED1210-24 RED1210-20 RED2300 RED4100 RED6100-1 RED2951 RED6952 RED6291 RED2611 RED0711 RED2990-1 RED6750-0 RED6700-5 RED6950 YEL2640 RED4210-1 RED5110 OR RED1260-9 RED1260-11 RED2990-2 ACCESSORY RELAY WHT1500-231 WHT1500-232 WHT1500-232 WHT1500-31 RED1210-19 RED1210-19 ( LVD SWITCHED ) ORN1221-2 ORN1250-10 ORN1250-10 ORN1221-2 ORN1250-11 ORN1220-51 RED1260-6 YEL2619-2 RED4100-8 MAIN GROUND RED1210-17 RED6951 170 AMPS ( WITH SLEEPER ) RED2414 RED4210 RED2100-4 RED2300-44 RED1210-18 RED1210-18 YEL2619-2 CB1 RED1210-30 RED1210-30 RED2412-1 RED2415-1 RED1210-21 MAIN CAB POWER RED1210-68 RED1210-68 F1A-1 F2A-1 F3A-1 F4A-1 F5A-1 F6A-1 FB7 RED0712-3 RED1210-12 RED1210-12 FB2 SPARE BAT PWR RED6140 RED1210-15 RED2100-8 RED1260-30 SH 14, REFDES J12, NODE 2 SH 14, REFDES S113, NODE 1 SH 46, REFDES P63, NODE 1 SH 35, REFDES J80, NODE B SH 21, REFDES P13 , NODE 2B SH 25, REFDES P32, NODE C SH 34, REFDES P92-4, NODE 4 SH 24, REFDES P92-2, NODE 1 SH 19, REFDES S28 , NODE 1 SH 17, REFDES J12-1, NODE 2 SH 22, REFDES P43, NODE B SH 22, REFDES J17-2, NODE A SH 25, REFDES P32 , NODE E SH 24, REFDES S16 , NODE 1 SH 47, REFDES J41-1, NODE 2 SH 67, REFDES P15 , NODE A SH 40, REFDES J12-3, NODE 2 SH 21, REFDES S21-1, NODE 1 SH 11, REFDES S22 , NODE 1 SH 12, REFDES S3-1, NODE 1 SH 12, REFDES S3-1, NODE 1 SH 11, REFDES S53 , NODE 1 SH 25, REFDES S115 , NODE 1 SH 47, REFDES P63-1, NODE 1 SH 11, REFDES K5 / K13 / K17, NODE 30-3 SH 25, REFDES P4 , NODE A SH 16, REFDES S38, NODE 1 SH 46, REFDES J41, NODE 2 SH 17, REFDES S33, NODE 1 SH 14, REFDES S87, NODE 1 SH 15 , REFDES T2 , NODE 1 SH 11, REFDES S43 , NODE 1 SH 41, REFDES S76, NODE 1 SH 37 , REFDES J100 , NODE B SH 17, REFDES J12-1, NODE 4 F7A-2 20 AMP F4A1-7 10 AMP F5A 25 AMP F6A 20 AMP S31-1 87A-3 30-3 85-3 87-3 86-3 K17 86 87 87A 30 85 R17-2 T4 150 AMPS F7A-6 25 AMP F7A-3 10 AMP F6A-3 20 AMP F5A-3 10 AMP F4A-3 10 AMP F3A-3 10 AMP F2A-3 20 AMP F1A-3 10 AMP F6A-5 15 AMP F5A-5 3 AMP F4A-5 25 AMP F3A-5 15 AMP F2A-5 10 AMP F1A-5 3 AMP F6A-6 10 AMP F4A-6 20 AMP F5A-6 5 AMP F3A-6 25 AMP F2A-6 15 AMP F1A-6 3 AMP 85-2 86-2 87A-2 87-2 30-2 K13 86 87 87A 30 85 R13-1 S80 T5-1 1 S41-3 T6-A 1 T5-A 1 T4-A 1 T6-B 1 T5-B 1 T4-B 1 T3-A 1 T2-A 1 T1-A 1 T3-B 1 T2-B 1 T1-B 1 50 AMP S55-1 J51 1 P51 1 S54-2 S52-1 50 AMP 50 AMP 50 AMP 50 AMP 50 AMP SH 16 , REFDES K2, NODE 30 SH 25, REFDES F4A-1, NODE 1 SH 25, REFDES P51-1, NODE 1 SH 25, REFDES K13 , NODE 30 Schematic - 379 Model Family Electrical P94-6023 C 10

1970-1997 Peterbilt 357, 375, 377, 378, 379 Electrical Wiring Diagrams Manual

1970-1997 Peterbilt 357, 375, 377, 378, 379 Electrical Wiring Diagrams Manual

Models Covered:

Engines Covered:

Transmissions Covered:

What’s Inside the Peterbilt Electrical Wiring Manual

Harness Architecture

Location of Major Components

Power Distribution Systems

Lighting Systems

Interior and Sleeper Systems

Transmission and Engine Systems

ABS and Safety Systems

Specialized Systems

How to Access the Peterbilt Electrical Wiring Manual

Why Choose the Peterbilt Electrical Wiring Manual

Get Your Peterbilt Electrical Wiring Manual Today