Chevrolet 2004 Astro Owner's Manual page 315

Fuse/Circuit Usage
Breaker
Air Conditioning Enable Relay and
A/C COMP
Compressor
RR HTR/AC Rear Heater and Air Conditioning
ATC Active Transfer Case-L Van
FRT HVAC Front Heater and Air Conditioning
Oxygen Sensors, Camshaft Position
Sensor, Mass Air Flow Sensor,
ENG-I
Evaporative Emission Canister Vent
Solenoid
IGN-E Air Conditioning Enable Relay Coil
Fuel Injectors 1–6, Crankshaft
ECM-I Position Sensot, VCM, Coil Driver
Module (EST), Ignition Coil
Blank Not Used
RH HDLMP Right Headlamp
LH Headlamp Left Headlamp
Blank Not Used
Blank Not Used
Fuse/Circuit Usage
Breaker
DIODE-1 Air Conditioning
Blank Not Used
Blank Not Used
Blank Not Used
Courtesy Fuse, Power Adjust
LIGHTING Mirrors Fuse, Truck Body Control
Battery Fuse
Power Accessory Circuit Breaker,
Stop/Hazard Fuse, Auxiliary Power
BATT
Fuse, Cigarette Lighter Fuse, Radio
Battery Fuse
IGN A Starter Relay, Ignition Switch
IGN B Ignition Switch
Electronic Brake
ABS
Control Module
Blank Not Used
RAP Radio Accessory, Power Windows
HTD MIR/RR Rear Window Defogger,Climate
DEFOG Control Head
5-101