GMC 1982 Light Duty Truck, Service Manual

Page: 1338 / 1435

8C-46 INSTRUMENT PANEL AND GAGES
E L E C T R I C A L C I R C U I T I D E N T I F I C A T I O N
Circuit
Number
Circuit
Color
Circuit Name
2
Red Feed, Battery - Unfused
3 Pink
Feed, Ign. Sw. "On & Crank"
Controlled, Unfused
4 Brown Feed, Ign. Sw. "Accsy & On"
Controlled, Unfused
5 Yellow
Neutral Safety Start Sw. or
Start Relay Feed
6 Purple Starter Solenoid Feed
7 Yellow Primary Ignition Resistance
By-Pass
8 Gray Instrument and Panel Lights
(Fused No. 44 Cir.)
9 Brown Tail, License, Park and Side
Marker Lamp Feed
10 Yellow Dimmer Sw. Feed
11 Light Green Fteadlamp Feed, Hi-Beam
12 Tan Headlamp Feed, Lo-Beam
13
Purple Front Parking Lamps
14 Light Blue L.H. Indicator and Front
Directional Lamps
15 Dark Blue R.H. Indicator and Front
Directional Lamps
16 Purple Directional Signal Sw., Feed
From Flasher
17 White Directional Signal Sw., Feed
From Stop Sw.
18
Yellow
Stop and Directional Lamp
or Directional Lamp
Only - Rear L.H.
19 Dark Green Stop and Directional Lamp or
Directional Lamp Only -
Rear R.H,
20 Light Blue Stop Lamp (Only)
21 Pink
Spot Light
22 White Direct Ground - Trailer
24 Light Green Back Up Lamp Feed
25 Brown
Feed, Voltage Regulator
Controlled
26 Dark Blue Field Circuit (F) (Gen/Reg.)
27 Brown Traffic Hazard Sw., Feed From
Hazard Flasher
28 Black Ground, Horn Sw. Controlled
29 Dark Green Horn Feed
30 Pink
Fuel Gauge to Tank Unit
31 Tan Oil Pressure, Engine
32 Yellow
Map Light Feed
33 Tan-White Warning Light - Brake
34 Purple
Fog or Drive Lamp
35 Dark Green Ground, Eng. Coolant Temp.
Sw. or ECM Controlled (Hot)
36
Light Green
Ground, Eng. Temp. Sw.
Controlled (Cold)
37
Light Green Ground, Eng. Metal Temp.
Sw. Controlled (Hot)
38 Dark Blue Flasher Fused Feed
Circuit
Number
Circuit
Color
Circuit Name
39
Pink-Black
Feed, Ign. Sw. "On and Crank"
Controlled - Fused
40 Orange
Feed, Battery - Fused
41
Brown-White Feed, Ign. Sw. "Accsy and
On" Controlled - Fused
42 Yellow
Feed, A/C Auto Relay Controlled
43 Yellow
Radio Feed
44 Dark Green
I.P. and Lights Feed (Usually
Light Sw. to Fuse)
45 Black
Marker and Clearance Lamps
(T railers)
46 Dark Blue Rear Seat Speaker Feed From
Single Radio or Right Stereo
47 Dark Blue
Auxiliary Circuit (Trailer)
48 Gray Tail Lp. - Headlamp Sw. "O n " -
or Dir. Signal and Stop -
Headlamp Sw. " O ff" Rear L.H.
49 Dark Blue
Tail Lp. - Headlamp Sw. "O n " -
or Dir. Signal and Stop -
Headlamp Sw. " O ff" Rear R.H.
50 Brown Feed, Ign. Sw. "O n " Controlled -
Fused
51 Yellow Blower Resistor Feed - Low
52
Orange Feed, Blow Sw. "H i" or
Selector Sw. "Max Cold"
Controlled
53
Light Green Valve Release Solenoid to
Control Box
54 Dark Green
Control to Shield
55 Orange Kick Down Solenoid Feed
56 Tan Am plifier to Transducer
57
Orange
L.H. Cornering Lamp Feed
58
Black R.H. Cornering Lamp Feed
59 Dark Green Compressor Feed
60
Orange-Black Feed, Battery, Circuit Breaker
Protected
61 Yellow
Ground, Resistive, Auto A/C
Amb. Sensor Controlled
62
Light Green
Ground, Resistive, Auto A/C
Feed Back Pot Controlled
63 Tan
Feed, Blower Sw. "Medium 1"
Controlled
64
Brown
Blower Sw. Feed From A/C
Selector Sw.
65 Purple
Blower M otor Feed
66 Light Green
Feed, A/C Selector Sw. Controlled
(Comp. Ct.)
67
Light Blue Feed, A/C Freon Press, Cut-Out
Sw. Controlled
68
Yellow-Black Ground, Resistive, Low Coolant
Probe Controlled
69 Gray
Ground Low Coolant Module
Controlled
70 Pink
Feed, Relay Controlled, Ign.
Sw. Controlled