GM Prizm/Nova 1985-1993 Repair Guide

CIRCUIT PROTECTION

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1985-90

See Figures 1, 2 and 3



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Fig. Fig. 1: Passenger compartment relay location - 1985-88



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Fig. Fig. 2: Passenger compartment relay location - 1989-90



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Fig. Fig. 3: Underhood fuse block - 1989-90

Both the Nova and the Prizm have fuses found in 2 locations. One fuse box is located within the cabin of the car, just under the extreme left side of the dashboard. This fuse box generally contains the fuses for body and cabin electrical circuits such as the wipers, rear defogger, ignition, cigarette lighter, etc. In addition, various relays and circuit breakers for cabin equipment are also mounted on or around this fuse box.

The second fuse block is found under the hood on the forward part of the left wheelhouse. The Nova uses a combination fuse block and relay board while the Prizm has an additional relay board next to the fusebox. The fuses and relays generally control the engine and major electrical systems on the car, such as headlights (separate fuses for left and right), air conditioning, horns, fuel injection, ECM, and fans.

Both the Nova and the Prizm have an additional small panel below the right side dash board containing a fuse (air conditioner) and a relay and circuit breaker for the heater system.

1991-93

See Figures 4, 5 and 6



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Fig. Fig. 4: Junction block No. 1 - 1993



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Fig. Fig. 5: Junction block No. 2 - 1993



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Fig. Fig. 6: Fuse and relay block - 1993

Vehicle fuses, fusible links and or relays are found in relay or junction blocks. Refer to the illustrated junction blocks the end of this section for identification and locations of fuses and relays. The covers for the relay or junction blocks identify each fuse, fusible link or relay. The junction blocks are located as follows: 1991-92



Junction Block No. 1: Lower left side shroud
 
Junction Block No. 2: Left side front of engine compartment
 
Junction Block No. 3: Contains no fuses
 
Junction Block No. 4: Lower right side shroud
 
Junction Block No. 5: Engine compartment left of battery 1993
 
Junction Block No. 1: Lower left side shroud
 
Junction Block No. 2: Lower right side shroud
 
Fuse and Relay box: Left side front of engine compartment left of air cleaner
 

 
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