PD803064.FRM

5 AFUSE

555439

439

A555

NONE

150

NTACT)

68A150150115439

B

P

SERVICE BRAKE

PRESSURE

SWITCH

531

B543

A543

(PRESSURE APPLIES SERVICE BRAKES)P

558

531

(PRESSURE RELEASES PARKING BRAKES)

PARKING

BRAKE

PRESSURE

SWITCH

NC

NO

NC

NO

BRAKE(S) ON

SERVICE BRAKES ON

PARKINGBRAKES ON

SERVICE BRAKES OFF

DDEC II

COOLANT

LEVEL

CONTROL

MODULE

KEY

CRANK

CRUISE

LIGHT

RELAY

PARKINGBRAKES OFF

BRAKE(S) OFF

DDECII FUSE HARNESS

509

419

A5

55

438

419

354

438

419

354

LIGHT

BAR

D

ST

OP

CH

EC

KE

NG

INE

CR

UIS

EC

ON

TR

OL

E

7

SK20627

DJJX

MNH

09-04-90

35989-08RG

MS

REV FOR NEW LIGHT BARB-2

EDPH

DPH

06-24-91

12503JJS

MS

5 AMP FUSE WAS 15 AMPC-2

GNDP

NDP

12-21-92

12822JJS

MS

CORRECTED PIN CALLOUTS

ON FIREWALL CONNECTOR

C-5

FMNH

MNH

10-03-91

91079-05RG

MS

1) REV DIAGNOSTIC CONN

AJC

B-4

2) ADD J1922A DATAB-4

LINK CONN

03-25-93

12885

DDEC II Engine SK20627 H 01

A1A2A3B1B2B3C1C2C3D1D2D3E1E2E3F1F2F3G1G2G3H1H2H3J1J2J3K1

P

916419509439901900

P

P451556557542544

545P

524

541531

P

K2K3

555508

952

417

P528543

115

505902

241241150150240240

ABCDEF

ECM

CONNECTOR

ECM POWER

CONNECTOR

A543555

P541

P542544545

P

901916952953

A543555902541

P542544545

900901916952953

FIREWALL

CONNECTOR

ABCDEFGHJKLMNP

531

528508509 P

451

115417150

531

528508509505

419115417150

ABCDEFGHJKLMNP

900P

451

+12VGND

BATTERY

241

241

240

240

298

239

953

150

556557

SPEED SENSOR

556

557

531

A543

543

CLUTCH

SWITCH

CLUTCHPEDAL

A150

68

NORMALCOOLANTLEVEL

COOLANT

LEVEL

SWITCH

150

150

544

545

558

CRUISERESUMESWITCH

542

541

558

CRUISESET/RESUMESWITCH

508

953

558

CRUISEON/OFFSWITCH

OPTIONAL SHUTDOWN SYSTEM OVERRIDE SWITCH

451

(MOMENTARY CO

F E D C B4

39

DIAGNOSTICCONNECTOR

150

901

900

A

916

417

952

952417916

THROTTLE

POSITION

SENSOR

68531A543558

BB

68531A543558

BB

A150150115439439

B

A150150115439439

B

439P

2329

KEY/START HARNESS

J1922DATALINKCONN

953

524

P

OPTIONALSHUTDOWN TIMERPARKING BRAKEPRESSURE SWITCH

(PRESSURE RELEASES BRAKES)

528953

(MOMENTARY CONTACT)

DIAGNOSTIC

SWITCH

901900

JAKEBRAKECONNECTION

239JAKE BRAKE MODULE

OPTIONAL JAKE BRAKE

ATEC 211223

224 224

223

508225289

ABCDEF

ABCDEF

225

223508289

224

242

225

289

211

239

ATEC CONNECTION(OPTIONAL)

DASHGROUND

MAIN CAB HARNESSENGINE BRAKE SWITCHCONNECTORS

508

439439

EO

F K

ILL C

ON

NE

CT

ION

SCHEMATIC - DETROIT DIESEL DDECII

PETERBILT 379 FAMILY

CKT FUNCTION2329

242289298354

439451

505508509524528531541542543

557

12V POWER (STARTER CRANKING)12V POWER (KEY ON)

12V POWER (KEY ON, FUSED)JAKE BRAKE12V POWER (CONSTANT)CRUISE CONTROL "ON" LIGHT

CRUISE SET

150A150

A543544545555556

CRUISE "ON" SIGNALVEHICLE SPEED SIGNAL (+)

900

68115

211223224225239240241

JAKE BRAKE - FRONTJAKE BRAKE - REAR DASH GROUND

419417 901

902916952953

ECM POWERECM POWER

LOW COOLANT PROBE SIGNALLOW COOLANT SIGNALECM GROUNDLOW COOLANT PROBE GROUNDJAKE BRAKE ATEC SIGNALJAKE BRAKE

DIAGNOSTIC SIGNAL

DATA LINK (+)DATA LINK (-)THROTTLE POSITION SIGNAL

"CHECK ENGINE" LIGHT438 "STOP ENGINE" LIGHT

IGNITION

972

TACH

TACH

ENGINE BRAKE ENABLE SIGNALSTOP ENGINE SIGNALPARKING BRAKE-IDLE TIMERSHUTDOWN OVERRIDEBRAKE/CLUTCH "ON"

CRUISE NOT SETBRAKE/CLUTCH "OFF"BRAKE "OFF"CRUISE NOT RESUMECRUISE RESUME

VEHICLE SPEED SIGNAL (-)

CRANK POSITION SIGNALTHROTTLE POSITION SENSOR POWERTHROTTLE POSITION SENSOR GROUNDSWITCH GROUND

558 CRUISE/PRESSURE SWITCH GROUND

CKT FUNCTION

NOTES:

1) SCHEMATIC FOR DETROIT DIESEL DDECII ENGINE WITH OPTIONAL JAKE BRAKE, SHUTDOWN SYSTEM AND IDLE SHUTDOWN TIMER

2) RELAY SHOWN IN NON-ENERGIZED POSITION

3) PRESSURE SWITCHES SHOWN IN NON-PRESSURIZED POSITION

5) CLUTCH SWITCH SHOWN WITH CLUTCH ENGAGED

4) PARKING BRAKES ARE RELEASED BY PRESSURE IN THE SYSTEM

DDECII ENGINE HARNESS

DDECII CAB HARNESS

15AFUSE

15AFUSE

A

A242239ABS239224225

LO

HIMED

HION/OFF B

A242

239ABS239

224225

C

AB

S

ABS CONN (OPT)

ATEC 211

DDEC II

CAB

HARNESS

MAIN

CAB

HARNESS

EN

GIN

E

DATALINKCONN

901900

F1 F2

524 524

6868

419

A150 A150

439439

G

H

AMCD

DPH

08-30-89

89057-03

RG

MS

REPLACED CB’S W/15A FUSES

ROC

B-7

CNDP

NDP

04-04-90

36548-02

MS

REVISED JAKE INSTLA-5

RG

ROC

HNDP

NDP RG

MS

CORRECTED PIN CALLOUTSB-5RG

ROCB

NDP

NDP

03-02-90

36538-02

MS

REVISED JAKE INSTLA-5