Chevrolet Astro 2003 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is located on the lower portion of the instrument panel on the driver’s side.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay | Functions |
| 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, Tailamps, Parking Lamps, Ashtray Lamp, Panel Lights, Trailer Taillamps, Front and Rear Sidemarker Lamps, Door Switch Illumination, Headlamp Switch Illumination, Rear Seat Audio Illumination, Truck Body Control Module |
| 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, 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, BTSI 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, TCC Enable and PWM Solenoid, Shift A and Shift B Solenoids, 3-2 Downshift Solenoid, Instrument Panel Cluster, VCM Module |
| 21 | Powr Adjust 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 |
Engine compartment fuse box:
| Fuse/Relay | Functions |
| AUX B | Upfitter Battery Feed |
| AUX A | Upfitter Accessory Feed |
| 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 |
| UPFITTER-BATT | Upfitter Battery Power Stud, Trailer Wiring Harness |
| UPFITTER-ACCY | Upfitter Accessory Relay |
| Spare | Not used |
| Spare | Not used |
| Spare | Not used |
| ECM-B | Fuel Pump Relay and Motor, VCM, Oil Pressure Switch/Sender |
| 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 |
| DIODE-1 | A/C |
| Blank | Not Used |
| Blank | Not Used |
| Blank | Not Used |
| 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 | Not Used |
| RAP | Radio Accessory, Power Windows |
| HTD MIR/RR DEFOG |
Rear Window Defogger,Climate Control Head |
