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.
| 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 |
| 11 | — |
| 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 |
| 22 | — |
| 23 | Rear Wiper, Rear Washer Pump |
| 24 | — |
| 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.
| 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 |
| Spare | — |
| Spare | — |
| Spare | — |
| 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 |
| Blank | — |
| RH HDLMP | Right Headlamp |
| LH Headlamp | Left Headlamp |
| Blank | — |
| Blank | — |
| DIODE-1 | Air Conditioning |
| Blank | — |
| Blank | — |
| Blank | — |
| 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 |
| Blank | — |
| 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.