GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Fuses Block and Fuses

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Fuses protect all the major electrical systems in the car. In case of an electrical overload, the fuse melts, breaking the circuit and stopping the flow of electricity.

If a fuse blows, the cause should be investigated and corrected before the installation of a new fuse. This, however, is easier to say than to do. Because each fuse protects a limited number of components, your job is narrowed down somewhat. Begin your investigation by looking for obvious fraying, loose connections, breaks in insulation, etc. Use the techniques outlined at the beginning of this section. Electrical problems are almost always a real headache to solve, but if you are patient and persistent, and approach the problem logically (that is, don't start replacing electrical components randomly), you will eventually find the solution.

Each fuse block uses miniature fuses (normally plug-in blade terminal-type for these vehicles) which are designed for increased circuit protection and greater reliability. The compact plug-in or blade terminal design allows for fingertip removal and replacement.

Although most fuses are interchangeable in size, the amperage values are not. Should you install a fuse with too high a value, damaging current could be allowed to destroy the component you were attempting to protect by using a fuse in the first place. The plug-in type fuses have a volt number molded on them and are color coded for easy identification. Be sure to only replace a fuse with the proper amperage rated substitute.

A blown fuse can easily be checked by visual inspection or by continuity checking.

FUSE LOCATIONS



Main Fuse Block

See Figures 1 and 2



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Fig. Fig. 1: On some vehicles, you may have to remove a cover for access to the main fuse block



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Fig. Fig. 2: The main fuse block is in or under the glove compartment

The main fuse block is located in the underside of the instrument panel, in or behind the glove compartment. Remove the access cover in the glove compartment to access the fuse block. Spare fuses and a fuse puller should always be kept here. Various convenience connectors, which snap-lock into the fuse block, add to the serviceability of this unit.

Convenience Center

The convenience center is located under the instrument panel, on the right side next to the fuse block. This unit houses circuit breakers, relays, chime module and hazard flasher.

Underhood Electrical Centers

See Figures 3, 4 and 5



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Fig. Fig. 3: Various underhood electrical centers contain fuses and relays



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Fig. Fig. 4: ...



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Fig. Fig. 5: ... remove the electrical center covers

The right side electrical center is located on the right side inner fender in the engine compartment. The left side electrical center is located on the left inner fender behind the battery. These centers house a variety of fuses, fusible links and relays, all of which are identified on the cover. The center can be serviced by unfastening the cover and remove the appropriate component.

Some vehicles may use a forward lamp center, which is located on the front right inner fender in front of the ECM unit.

Some vehicles with ABS utilize an ABS electrical center. The center is located between the shock tower and the battery.

REPLACEMENT



See Figures 6 and 7

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Fig. Fig. 6: Pull the fuse from the block and check the element



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Fig. Fig. 7: Visual examination will reveal a blown fuse, but it should not be replaced until repairs are made

  1. Locate the fuse for the circuit in question.
  2.  

When replacing the fuse, DO NOT use one with a higher amperage rating.

  1. Check the fuse by pulling it from the fuse block and observing the element. If it is broken, install a replacement fuse the same amperage rating. If the fuse blows again, check the circuit for a short to ground or faulty device in the circuit protected by the fuse.
  2.  
  3. Continuity can also be checked with the fuse installed in the fuse block with the use of a test light connected across the 2 test points on the end of the fuse. If the test light lights, replace the fuse. Check the circuit for a short to ground or faulty device in the circuit protected by the fuse.
  4.  

 
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