Chevrolet Astro (2003) – fuse box diagram

Year of production: 2003

Instrument Panel Fuse Block

The fuse block is located on the lower portion of the instrument panel on the driver’s side.

Chevrolet Astro - fuse box - instrument panel
Chevrolet Astro – fuse box – instrument panel
Fuses/Circuit Breaker Usage
1 Stop/Tum/Hazard Lamps, Center High Mounted Stop Lamp, Anti-Lock Brakes
2 Radio Accy, Rear Seal Audio Contro!s
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. Truek Body Control Module, Instrument Panel Cluster, Cruise Control Switch, Electrochromic Mirror
7 Power Outlets, DLC, Subwoofer Amplifier
8 Crank Circuit Fuse, Park/Neutral Switch, Starter Enabler Relay
9 License Prate Lamp, Taillamps, Parking Lamps, Ashtray Lamp, Panel Lights, Trailer Taillamps, Front and Rear Sidemarker Lamps, Door Switch Illumination, Headlamp Switch illumination, Rear Seat, Audio illuminati0n, Truck Body Control Module
10 Air Bag System
12 L, M1, M2 Blower Motor, Rear Air Conditioning Relay Coli, Front Cont,  Temp Door Motor. HI Blower Relay,  Defogger Timer Coil
13 Cigarette lighter , Door Lock Switches. Dutch Door Release Module
14 Cluster Illum, Climate Controls, Chime Module, Radio illumination, Rear Heat Switch illumlnation, Rear Wiper/Washer Switch illumination, Rear Lifegate Switch illumination, Remote Cassette illumination, Overhead Console, Truck Body Control illumination
15 Truck Body Module, Headlamp Relay
16 Front Tum Signals, Rear Turn Signals, Trailer Turn Signals, Back-Up Lamps, Brake Transmission Shift interlock Solenoid
17 Front Wipers, Front Washer Pump
18 VCM-Ign 3, VCM-Brake, Cruise Step par Motor Sjgnal, A TC 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 Power  Adjust Mirrors
23 Rear Wiper, Rear Washer Pump
A (Circuit Breaker) Power Door lock Relay, 6-Way Power Seats
B (Circuit Breaker) Power Windows

Underhood Fuse Block

The underhood fuse block is located toward the rear of the engine compartment on the driver’s side of the vehicle.

Chevrolet Astro - wiring diagram - fuse box - under hood panel
Chevrolet Astro – wiring diagram – fuse box – under hood panel
Feef Usage
AUX B Upfitter Battery Feed
AUX A Upfitter Accessory Feed


Relays Usage
A/C Relay (Rear Heat and A/C) Rear/Heat and Air Conditioning
Upfitter ACCY Relay Upfitter Accessory
Starter Enable Relay Starter
A/C Enable Relay Air Conditioning
Headlamps Relay Headlamps
Fuel Pump Relay Fuel Pump
Fuse/Circuit Breaker Usage
UPFITTER-BATT Upfitter Battery Power Stud. Trailer Wiring Harness
UPFITTER-ACCY Upfitter Accessory Relay
ECM-1B Fuel Pump Relay and Motor, VCM oil Pressure Switch/Sender
HORN Horn Relay and Horn
A/C COMP Air Conditioning Enable Relay and Compressor
RR HTR/AC Rear Heater and Arr Conditioning
ATC Active Transfer Case-L Van
FAT HVAC Front Healer and Air Conditioning
ENG-I Oxygen Sensors, Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission Canister Vent Solenoid
IGN-E Air Conditioning Enable Relay Coil
RH HDLMP Right Headlamp
LH Headlamp Left Headlamp
DIODE-1 Air Conditioning
LIGHTING Courtesy Fuse, Power Adjust Mirrors Fuse, Truck Body Control, Battery Fuse
BATT Power Accessory Circuit Breaker, 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
RAP Radio Accessory, Power Windows
HTD MIR/RR DEFOG Hear Window Defogger, Climate Control Head

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.