1

INTRODUCTION

This booklet contains Wiring Diagrams for 1979 vehicles listed in the contents below.

All diagrams contained in this booklet are based on the latest product information

available at the time of publication approval. The manufacturer reserves the right to make

product changes at any time.

Wire sizes in this booklet are metric. The following table shows metric to AWG size

conversions.

WIRE SIZE CONVERSION TABLE

METRIC SIZE (mm)2

AWG SIZE

.22

.5

.8 1 2 3 5 8

13 19 32

24 20 18 16 14 12 10 8 6 4 2

CONTENTS

VEHICLE CAB, ENGI~";E & CHASSIS WIRING DIAGRAM

C, 1<-10 thru 35 A-I, 2, 3, 4, \ 6 G-lO thru 35 . 8-1, 2, 3, 4 P-I0 thru 35. . C-l, 2

D-SO •.. • • D-l, 2, 3

2

CIRCUIT TABULATION

CircuitCircuit Circuit Name•Circuit Number

2 3

4

5

Circuit Circuit Name

Color

Red • Feed, Battery - Unfused I If II It

Pink I Feed, Ign. Sw. On & Crank • Controlled. Unfused

Brown IFeed, Ign. Sw. "Accsy & On" Controlled, Unfused

Yellow • Neutral Safety Start Sw. or

6 Purple 7 Yellow

8 Gray

9 Brown

10 Yellow 11 Ligh~ Green 12 Tan 13 Purple 14 Light Blue

15 Dark Blue

16 Purple

17 White

18 Yellow

19 Dark Green

20 Light Blue 21 Pink 22 White 24 Light Green 25 Brown

26 . Dark Blue 27 Brown

28 Black 29 Dark Green 30 Pink 31 Tan 32 Yellow 33 Tan-White 34 Purple 35 Dark Green

36 Light Green

37 Light Green Sw. Controlled (Hot)

Flasher Fused FeedDark Blue

i Start Relay Feed Starter Solenoid Feed Primary Ignition Resistance

By-Pass Instrument and Panel Lights

(Fused No. 44 Cir.) Tail, License, Park and Side

Marker Lamp Feed Dimmer Sw. Feed Headlamp Feed, Hi-Beam Headlamp Feed, Lo-Beam Front Parking Lamps L.H. Indicator and Front

Directional Lamps R.H. Indicator and Front

Directional Lamps Directional Signal Sw., Feed

From Flasher Directional Signal Sw., Feed

From Stop Sw. Stop and Directional Lamp

or Directional Lamp Only - Rear L.H.

Stop and Directional Lamp or Directional Lamp Only ­Rear R.H.

Stop Lamp (Only) Spot Light Direct Ground Trailer Back Up Lamp Feed Feed, Voltage Regulator

Controlled Field Circuit (F) (Gen/Reg.) Traffic Hazard Sw., Feed from

Hazard Flasher Ground, Horn Sw. Controlled Horn Feed Fuel Gauge to Tank Unit Oil Pressure, Engine Map Light Feed Warning Light - Brake Fog or Drive Lamp Ground, Eng. Coolant Temp.

Sw. Controlled (Hot) Ground, Eng. Temp. Sw.

Controlled (Cold) Ground, Eng. Metal Temp.

Number Color

39 Pink-Black

40 Orange 41 Brown-White

42 Yellow

43 Yellow 44 Dark Green

45 Black

46 Dark Blue

47 Dark Blue 50 Brown

51 Yellow 52 Orange

53 Light Green

54 Dark Green 55 Orange 56 Taf"\ 57 Orange 58 Black 59 Dark Green

Feed, Ign. Sw. "On and Crank" Controlled - Fused

Feed, Battery Fused Feed, Ign. Sw. "Accsy and

On" Controlled Fused Feed, AIC Auto Relay Con­

trolled Radio Feed I.P. and Lights Feed (Usually

light Sw. to Fuse) Marker and Clearance Lamps

(Trailers) Rear Seat Speaker Feed from

Single Radio or Right Stereo Auxiliary Circuit (Trailer) Feed, Ign. Sw. "On" Con­

trolled - Fused Blower Resistor Feed - Low Feed, Blow Sw. "Hi" or

Selectro Sw. "Max Cold" Con­trolled

Valve Release Solenoid to Control Box

Control to Shield Kick Down Solenoid Feed Amplifier to Transducer L.H. Cornering Lamp Feed R.H. Cornering Lamp Feed Compressor Feed

60

61

62

63

64

65 66

67

68

69

70

71

72

73

Orange-Black

Yellow

Light Green

Tan

Brown

Purple Light Green

Blue

Yellow-Black

Gray

Pink

Black

Light Blue

Purple-White

Feed, Battery, Circuit Breaker Protected

Ground, Resistive, Auto AIC Amb. Sensor Controlled

Ground, Resistive, Auto AIC Feed Back Pot Controlled

Feed, Blower Sw. "Medium 1" Controlled

Blower Sw. Feed from AIC Selector Sw.

Blower Motor Feed Feed, AIC Selector Sw. Con­

trolled (Comp. Ct.) Feed, AIC Freon Press, Cut-

Out Sw. Controlled Ground, Resistive, Low Cool-

and Probe Controlled Ground Low Coolant Modu Ie

Controlled Feed, Relay Controlled, Ign.

Sw. Controlled Ground, AIC Selector Sw. "Def"

Controlled Feed, Blower Sw. "Medium 2"

Controlled Feed, Blower Sw. "Medium 3"

Controlled

I

38

3

I

CIRCUIT TABULATION

Circuit Circuit Number. Color

74 Light Green 75 Dark Blue

76 Pink 78 Light Blue 80 Light Green 83 Dark Green

84 Dark Blue

85 White

86 Brown

90 Pink

91 Gray 92 Purple 93 White 94 Pink 95 Dark Green

96 Brown

99 Black·White 101 Dark Blue 102 White

105 Black 106 Gray 107 Dark Blue 111 Black

112 Dark Green

115 Light Blue 116 Yellow 117 Dark Green 118 Gray 119 White

120 Purple 121 White 125 Yellow 126 Black 130 Brown·White

131 Black-Pink

132 White

133 Yellow

135 Dark Green White

Circuit Name

Feed to Throttle Switch Feed. Ign. Sw. "On and Crank"

Controlled - Fused Feed, Ign. Sw. Controlled Electric Choke Feed Ground Key Warning Buzzer Feed, Cruise Engage Sw.

"Retard" Controlled Feed, Cruise Engage Sw.

"Engage" Controlled Ground, Cru ise Indicator

Regulator Controlled Feed, Cruise Brake Release Sw.

Controlled Feed, Cutout Sw. Controlled,

Ci r. Brkr. Protected Windshield Wiper - Low Windshield Wiper - Hi Windshield Wiper Motor Feed Windshield Washer Sw. to Washer Ground, Pulse Wiper Sw.

Controlled Feed, Pulse Wiper Rheostat

Sw. Controlled Windshield Washer Low Fluid Resistor Output to Blower Relay Sl Alternator - Regulator

Sensing Circuit Ammeter - Generator Ammeter Battery Over Speed Warning Light Ground, Anti-Ski Low Air Sw.

Controlled Telltale Temperature Gauge

(Hot) Speaker Return, RT rr Stereo Speaker Return, LF rr Stereo Speaker Return, RT Frt. Stereo Speaker Return, LF Frt. Stereo Generator (Alternator) to

Regulator Electric Fuel Pump Feed Tachometer to Coil Door Jamb Switch Seat Back Lock Feed Generator (Alternator) Ext.

Resist. 2 Ohms/Foot Generator (Alternator) Ext.

Resist. 1 Ohm/Foot Ground, Fuel Economy Sw.

Controlled, Amber Telltale Ground, Fuel Economy Sw.

Controlled, Grn. Telltale

Ground, Resistive, Temp. Gauge Sender Controlled

Circuit Circuit Number Color

139

I 140I 141

142

143 144 145

150 151 152 153 154 155 156

157

158

159 160 161 162 163 164 165 166

167 168 169 170 171 172 173 174 175 176 177 178

179

180

Pink-Black

Orange Brown-White

Black

Pink Yellow Dark Green

Black Black Black Black Black Black White

Gray

Black·Orange

Tan White Black Gray

; Purple i Dark Blue I Brown ; Dark Blue· i White Tan Dark Green Purple Light Green Purple-White Light Green Yellow Dark Green Purple Dark Green Yellow Dark Green

Tan

Light Green

Circuit Name

Feed. Ign. Sw. "On and Crank" Controlled - Fused

Feed, Battery - Fused Feed, Ign. Sw., "Accsy and On"

Controlled Rr Compartment Lid Lock

Release Feed Radio Sw. "On" Controlled Feed to Pwr Ant Sw. Feed, Pwr Ant Up, Relay Con­

trolled Ground Circuit - Direct Ground Circuit - Direct Ground Circuit - Direct Ground Circuit Direct Ground Circuit Direct Ground Circuit - Direct Ground Circuit - Sw. Controlled

Body Interior Lamps such as Dome, Courtesy, Map Warning, etc.

Ground Circuit - Sw. Controlled ­Body Interior Lamps - such as Dome, Courtesy, Map, Warning etc.

Ground Circuit Sw. Controlled Body Interior Lamps - such as Dome, Courtesy, Map, Warning etc.

Ground, Key Warning Buzzer Power Antenna Down Power Antenna Up Power Top - Up Power Top - Down Window Control LF Up Window Control LF Down

Wi ndow Control RF Up Window Control RF Down Window Control LR Up Window Control LR Down Window Control RR Up Window Control RR Down Vent Control LF Close Vent Control LF Open Vent Control RF Close Vent Control RF Open Power Seat Fore Power Seat Aft or Recline Power Seat 6-Way Fore and

Aft Power Seat - 6-Way Solenoid ­

Rear - Up and Down Power Seat - 6-Way Solenoid ­

Front Up and Down

4

CIRCUIT TABULATION

CircuitCircuit Circuit Name

ColorNumber I Cifcuit ; Number

219

220

221

222

223 224 225 226 227 228 229

230 231 232 233 234 237

238

239

240 242

243

244

245

246 247 248

249 252

253

254

255

256

257

260 261

Circuit Color

light Green-Black Yellow

Brown

Dark Blue

light Blue Light Green Purple Orange Tan Yellow Pink

Pink Light Blue Dark Blue Dark Qreen Tan Yellow

Black

Pink-Black

Orange Tan

Black-White

Purple

Dark Blue

Dark Green Brown Dark Blue

Dark Green Yellow

Dark Brown

Light Green

Yellow

Dark Blue

Brown

Black Yellow

Circuit Name

Starter Interlock Controlled Starter Feed

Starter Interlock Buz and Lp Feed

La Level Actuation Passenger System

Common Return Hi & Lo Fire Circuits Passenger

Bumper Sw. Actuation Lo Pressure Warning Warning Lamp Ground Warning Lamp Sensor Recorder to Sensor Power Feed Warning Lamp Feed Sensor & Bumper Sw. Power

Feed Recorder Power Feed Driver Low Level Actuation Driver Return Hi Level Actuation Passenger Ign. Sw. Cant Air Rest Feed Feed, Belt Warn Timer Con­

trolled (Timed 39 Ct.) Seat Belt Warn System-Buzzer

Ground to Belt Assy Sw. Feed, Ign. Sw. "On & Crank"

Controlled Fused Feed, Battery - Fused Feed, Throttle Control Spark

Valve Controlled

Feed, Drive Selector Sw. Con­trolled

Feed, L T FID Solenoid Relay Controlled

Feed, RT F ID Solenoid Relay Controlled

Feed, ADL Lock Relay Coil Feed, to AIC Shut·Off Relay Feed, to AIC Compressor Harn

Relay Controlled Feed, From AIC Harn Ground, ADL Module Unlock

Output Controlled Ground, ADL Module Lock

Output Controlled Ground, AD L L T Unlock Relay

Coil Ground, ADL RT Unlock Relay

Coil Ground, Module Controlled.

Lamp Out Indicator Ground, AIC Press, Sw. Con­

trolled Theft Deterrent - Hood Sw. Theft Deterrent Alarm Arm

181 182

183

184

185 186 187 188 189

190 191

192 193

light Blue Yellow

Light Blue

Tan-White

Tan Gray Dark Blue Light Blue Dark Green

Yellow light Green

Purple Purple·White

Power Solenoid - Fore and Aft Power Seat 6-Way - Aft and

Down Tailgate or Center Partition

Window Up Tailgate or Center Partition

Window Down Vent Control LR Open Vent Control LR Close Vent Control R R Open Vent Control RR Close Power Seat 4-Way - Fore and

Down Power Seat 4-Way Aft and Up Power Seat 4-Way Solenoid ­

Up and Down Defogger - Hi or Si ngle Speed Defogger - Low Speed - 0.38

Ohms per foot 194 195 198

199

200

201

202

203 204 205

Black light Blue light Green Black

Brown

light Green

Tan

Black

Light Blue Dark Blue White-Black

206 I Dark Blue

Electric Door Lock - Unlock Electric Door Lock Lock

Ground, Resistive, AIC In-Car Sensor Controlled

Rear Seat Speaker Feed trom Radio Left Stereo

Front Speaker Feed From Radio Single or Right Stereo

Front Speaker - Feed trom Radio Left Stereo

Ground, Compressor over Heat Sw. Controlled

Rear AIC Potentiometer Feed Thermal limiter Feed Seat Belt Seat Sensor to Belt

Retractor (Grd) Neutral Start Sw. to Buzzer

207

208 209 210

211

212

213 214 215 216

I i 217

I 218

Yellow

Gray Purple White

Dark Blue

Yellow­Black Stripe Dark Blue Gray Tan-Black Dark Blue­White Gray-White Dark Green

and Lamp Seat Sensor to Neutral Start

Sw. (Lamp and Buzzer Grd) Sw. Controlled Ground (TCS) Park Brake Warning Lamp Power Seat - 6-Way - Fore and

Down - "A" Body Power Seat 6-Way - Aft and

Up - "A" Body

LH Seat Sensor Center Seat Sensor R H Seat Sensor LH Sw.

Center Buckle Sw. (Feed) RH Sw. Interlock Relay - Ground

(Provided by Electronics)

I

--

5

CIRCUIT TABULATION

Circuit Circuit Circuit Name

Number Color

262 Theft Deterrent - Key - Door Unlock and Alarm Disarm

263

Light Green

Theft Deterrent Alarm

264 Light Blue

Theft Deterrent - Arm Indication 265

Dark Green Theft Deterrent - Alarm Output

266 Black·White

Theft Deterrent - Alarm Arm Abort

267

Pink

Pwr Seat - Fore and Up Recl iner

268 Dark Green

Pwr Seat - Aft and Down Recliner

269

Yellow

Pwr Seat - Sol Up and Down Recliner

270

Light Green

Feed, Amplifier to Potentiometer 271

Black· Yellow Ground, Potentiometer Controlled

272 Purple

Feed, Potentiometer Rheostat Controlled

273

Light Green

Feed, Hdlp Sw. to Amplifier, Hdlp Sw. Controlled

274

Yellow

Dark Green-White Feed, Hdlp Sw. to Amplifier

275 Feed, Neut Saf Start Sw. "Park" Controlled

276

Light Green

Recl. Mtr. Feed, Power St. Fwd. 277

Light Green Recl. Mtr. Feed, Power St.

Recliner 278

Light Blue

Amplifier to Photocell 280

Dark Green Feed, P.M. Motor Up Cycle

(Deck Lid Pull Down) 281

Pink

Ground, Relay Coil Down Cycle (Deck Lid Pull Down)

291

White

Ground, Heated Glass Timer, On-Off Sw. Controlled

292

Dark Blue

Feed, Heated Glass Timer, On-Off Sw. Controlled

293

Light Blue

Feed, Heated Glass Timer Controlled

294

Purple-White

Door Lock Motor - Unlock 295

Tan Door Lock Motor Lock

300 Gray

Feed, Ign. Sw., "On" Con­trolled - Unfused

339

Orange

Feed, 19n. Sw. On and Crank Controlled Fused

340

Pink-Black

Feed, Battery - Fused 350

Orange Feed, Ign. Sw. "On" Con­

trolled - Fused 394

Pink-White

Ground, L T FID Remote Handle

Black Light Green-

Sw. Controlled

395 Ground, RT FID Remote Handle Sw. Controlled

402

Light Blue

Feed, Electronic Cruise Control Valve

439

Light Green

Pink·Black Feed Ign. Sw. "On & Crank" Controlled - Fused

Feed, Battery - Fused440 Orange

i

Circuit Number

618

619

756

801

804

807 808

810

811

812

813

814

815

816 817 818

819 820 821

822

823

824

827

828

831

Circuit Color

Yellow-Black

Green-White

Dark Green-White Brown

Purple

Purple

Dark Blue

Tan

White

Pink

White

Yellow

Black

Pink

Tan Light Green

Black·White Orange Dark Green

Dark Blue

Gray

Orange

Dark Green

Gray

Brown

Circuit Name

Feed, L T Side Trailer and Direction

Feed, RT Side Trailer and Direction

Feed, Vac Sol Controlled (For Electronic Distributor)

Feed, EFI Battery Controlled, Fusible Link Protected

Feed, EFI, Ign. Sw. "Crank" Controlled, Fusible Link Protected

Feed, EFI Battery Controlled, Fused

Feed, EFI Module Fast Idle Valve Output and 3 Circuit Con­trolled' Fused

Feed, Distri butor Electron ics Controlled

Feed, EFI Module Group Two Injector Output Controlled Fusible Link Protected

Feed, EFI Module Group One Injector Output Controlled Fusible Link Protected

Feed, EFI Distributor Trigger and 815 Circuit Controlled, Fused

Feed, EF I Distributor Trigger and 815 Circuit Controlled, Fused

Feed, EFI Module Distributor Trigger Output Controlled, Fused

Accelerator Enrichment Input #2 Accelerator Enrichment Input #1 Accelerator Enrichment Sw.

Supply Voltage Clossed Throttle Sw. Wide Open Throttle Switch Ground, EFI Module Coolant

Temp. Sensor Output Con­trolled

Ground, Resistive, Coolant Temp. Sensor Controlled

Ground, EFI Module Air Temp. Sensor Output Controlled

Ground, Resistive, Air Temp. Sensor Controlled

Feed, EFI Module Elec Fuel Pump Output Controlled ­Fused

Feed, EFI, Ign. Sw. "On & Crank" Controlled, Fused

Feed, EFI Module EGR Solenoid Output Controlled, Fused