Chevrolet Astro (1999) – fuse box diagram
Year of production: 1999
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, Chime Module |
| 2 | Heated Mirror (Not Used) |
| 3 | Courtesy Lamps, Power Outside Mirrors, Glove Box Lamp, Dome Reading Lamps, Vanity Mirror Lamps |
| 4 | DRL Relay, DRL Module, Chime Headlamp Switch, Keyless Entry, Cluster, Overhead Console, Interior Lamps Module |
| 5 | Rear Defogger |
| 6 | Cruise Module, Cruise Control Switch, Electrochromic Mirror |
| 7 | Power Outlets, DLC, Subwoofer Amplifier |
| 8 | 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 |
| 10 | Air Bag System |
| 11 | Wiper Motor, Washer Pump, Upfitter Relay Coil |
| 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 Consol |
| 15 | DRL Lamps |
| 16 | Front Turn Signals, Rear Turn Signals, Trailer Turn Signals, Back-up Lamps, BTSI Solenoid |
| 17 | 2000 Series (Main Feed), Rear Seat Audio Controls |
| 18 | VCM-Ign 3, VCM-Brake, 4WAL, Cruise Stepper Motor Signal |
| 19 | 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 |
| 21 | Security |
| 22 | — |
| 23 | Rear Wiper, Rear Washer Pump |
| 24 | — |
| A | (Circuit Breaker) Power Door Lock Relay, 6-way Power Seat, Remote Control Door Lock Receiver, Dutch Door Module, Dutch Door Release |
| 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 |
| A/C Relay (Rear Heat and A/C) |
| Upfitter ACCY Relay |
| Starter Enable Relay |
| A/C Enable Relay |
| Fuel Pump Relay |
| 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 | A/C Enable Relay and Compressor |
| ATC | Active Transfer Case-L Van |
| ENG-I | Oxygen Sensors, Camshaft Position Sensor, Mass Air Flow Sensor, Evaporative Emission Canister Purge Solenoid, Linear EGR Valve Solenoid, VCM EGR HI |
| IGN-E | A/C Enable Relay Coil |
| ECM-I | Fuel Injectors 1-6, Crankshaft Position Sensor, VCM, Coil Driver Module (EST) |
| LIGHTING | Park Lamps Fuse, DRL Fuse, Headlamp and Panel Dimmer Switch |
| BATT | Steering/Security Fuse, Courtesy Fuse, ACSY 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 |
| A/C | Blower Motor Resistor, Blower Relay |
| RR HTR/AC | Auxiliary Heater, A/C Relay |
| HTD MIR/RR DEFOG | Rear Window Defogger |
| *A fuse puller is included in the underhood electrical center. You will also find spare fuses. | |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.