relay CHEVROLET ASTRO 2002 Owners Manual

6-68
Fuse/Circuit
BreakerUsage
1 Stop/Turn/Hazard Lamps,
Center High Mounted Stop
Lamp, Anti
-Lock Brakes
2 Radio Accy, RR Seat
Audio ControlsFuse/Circuit
BreakerUsage
3 Courtesy Lamps, Glove Box Lamp,
Dome Reading Lamps, Vanity
Mirror Lamps, Courtesy Lamps
4 Daytime Running Lamps Relay,
Instrument Panel Cluster
5 Rear Defogger
6 Cruise Module, TBC Module,
Instrument Panel Cluster,
Cruise Control Switch,
Electrochromic Mirror
7 Power Outlets, DLC,
Subwoofer Amplifier
8 Crank Circuit Fuse, Park/Neutral
Switch, Starter Enable Relay
9 License Plate Lamp, Taillamps,
Parking Lamps, Ashtray Lamp,
Panel Lights, Trailer Taillamps,
Front and Rear Sidemarker
Lamps, Door Switch Illumination,
Headlamp Switch Illumination,
Rear Seat Audio Illumination,
TBC Module

6-69
Fuse/Circuit
BreakerUsage
10 Air Bag System
11 Not Used
12 L, M1, M2 Blower Motor, Rear A/C
Relay Coil, Front Cont. Temp. Door
Motor, HI Blower Relay, Defogger
Timer Coil
13 Cigarette Lighter, Door Lock
Switches, Dutch Door Release
Module
14 Cluster Illum, HVAC Controls,
Chime Module, Radio Illumination,
Rear Heat Switch Illumination,
Rear Wiper/Washer Switch
Illumination, Rear Liftgate Switch
Illumination, Remote Cassette
Illumination, O/H Console,
TBC Illumination
15 TBC Module, Headlamp Relay
16 Front Turn Signals, Rear Turn
Signals, Trailer Turn Signals,
Back
-Up Lamps, BTSI SolenoidFuse/Circuit
BreakerUsage
17 Front Wipers, Front Washer Pump
18 VCM
-Ign 3, VCM-Brake, Cruise
Stepper Motor Signal, ATC Module
19 Instrument Panel Radio: ATC
(Main Feed), 2000 Series (Standby)
20 PRNDL/Odometer, TCC Enable
and PWM Solenoid, Shift A and
Shift B Solenoids, 3
-2 Downshift
Solenoid, Instrument Panel Cluster,
VCM Module
21 Pwr Adj Mirrors
22 Not Used
23 Rear Wiper, Rear Washer Pump
24 Not Used
A (Circuit Breaker) Power Door
Lock Relay, 6
-Way Power Seats
B (Circuit Breaker) Power Windows

6-71
Relay Usage
A/C Relay
(Rear Heat
and A/C)Rear Heat and
Air Conditioning
Upfitter
-ACCY
RelayUpfitter Accessory
Starter
Enable RelayStarter
A/C Enable Relay Air Conditioning
Headlamps Relay Headlamps
Fuel Pump Relay Fuel Pump
Fuse/Circuit
BreakerUsage
UPFITTER
-BATT Upfitter Battery Power Stud,
Trailer Wiring Harness
UPFITTER
-ACCY Upfitter Accessory Relay
Spare Not used
Spare Not used
Spare Not used
ECM
-1B Fuel Pump Relay and Motor,
VCM, Oil Pressure Switch/SenderFuse/Circuit
BreakerUsage
HORN Horn Relay and Horn
A/C COMP A/C Enable Relay and
Compressor
RR HTR/AC Rear Heater and A/C
ATC Active Transfer Case
-L Van
FRT HVAC Front Heater and A/C
ENG
-I Oxygen Sensors, Camshaft
Position Sensor, Mass Air Flow
Sensor, Evaporative Emission
Canister Vent Solenoid
IGN
-E A/C Enable Relay Coil
ECM
-I Fuel Injectors 1-6, Crankshaft
Position Sensor, VCM,
Coil Driver Module (EST),
Ignition Coil
Blank Not Used
RH HDLMP Right Headlamp
LH Headlamp Left Headlamp
Blank Not Used
Blank Not Used

6-72
Fuse/Circuit
BreakerUsage
DIODE
-1 A/C
Blank Not Used
Blank Not Used
Blank Not Used
LIGHTING Courtesy Fuse, Pwr. Adj. Mirrors
Fuse, TBC
-Battery Fuse
BATT Power ACCY CB, Stop/Hazard
Fuse, Auxiliary Power Fuse,
Cigarette Lighter Fuse,
Radio Battery Fuse
IGN A Starter Relay, Ignition Switch
IGN B Ignition Switch
ABS Electronic Brake
Control Module
Blank Not Used
RAP Radio Accy, Power Windows
HTD MIR/
RR DEFOGRear Window Defogger,
HVAC Control Head
Replacement Bulbs
Halogen Headlamps -
Sealed Beam2 H6054
Halogen Headlamps
-
Composite2 9006
(Low Beam)
Halogen Headlamps
-
Composite2 9005
(High Beam)
Parking, Turn Signal Lamps 23157NA
Rear, Stoplamps 22057
Sidemarker Lamps 4 194
Back
-Up Lamps2 1156
For any bulb not listed here, contact your dealer.