Chevrolet Astro (2004) – fuse box diagram
Year of production: 2004
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/Turn/Hazard Lamps, CHMSL, ABS |
| 2 | Radio ACCY, RR Seat Audio Controls |
| 3 | Courtesy Lamps, Glove Box Lamp, Dome Reading Lamps, Vanity Mirror Lamps, Courtesy Lamps |
| 4 | DRL 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 |
| 10 | Air Bag System |
| 11 | — |
| 12 | Blower Motor, Rear Air Conditioning 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 Illumination, Climate Controls, Chime Module, Radio Illumination, Rear Heat Switch Illumination, Rear Wiper/Washer Switch Illumination, Rear Liftgate Switch Illumination, Remote Cassette Illumination, Overhead Console, Truck Body Control Illumination |
| 15 | TBC Module, Headlamp Relay |
| 16 | Front Turn 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 Stepper Motor Signal, ATC Module |
| 19 | Instrument Panel Radio: ATC (Main Feed), 2000 Series (Standby) |
| 20 | PRNDL/Odometer, Shift A and Shift B Solenoids, 3–2 Downshift Solenoid, Instrument Panel Cluster, VCM Module |
| 21 | Pwr Adj 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.
| Feed | 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 Air Conditioning |
| 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 | Air Conditioning Enable Relay Coil |
| ECM-I | Fuel Injectors 1–6, Crankshaft Position Sensot, VCM, Coil Driver Module (EST), Ignition Coil |
| 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 | Rear Window Defogger,Climate Control Head |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.