ParkAvenue 1997-1999

Circuit Protection

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Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

Fuses (located on a swing down unit near the steering column or in the glove box) 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.

The amperage of each fuse and the circuit it protects are marked on the fuse box, which is located under the left side (driver's side) of the instrument panel and pulls down for easy access.

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

The fusible link is a short length of special Hypalon (high temperature) insulated wire, integral with the engine compartment wiring harness and should not be confused with standard wire. It is several wire gauges smaller than the circuit which it protects. Under no circumstances should a fuse link replacement repair be made using a length of standard wire cut from bulk stock or from another wiring harness.

Most newer cars have replaced fusible links with very large plug-in fuses. Sometimes these fuses are referred to as Fusible Links or Maxi-fuses. These new plug in type fusible link no longer require repair; simply replacement like a fuse.



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Fig. Underhood relay locations will differ, depending upon the vehicle - 1992 Eighty Eight shown



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Fig. Relay location and identification in the relay center - 1991 Eighty Eight shown

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

The headlights are protected by a circuit breaker in the headlamp switch. If the circuit breaker trips, the headlights will either flash on and off, or stay off altogether. The circuit breaker rests automatically after the overload is removed.

The windshield wipers are also protected by a circuit breaker. If the motor overheats, the circuit breaker will trip, remaining off until the motor cools or the overload is removed. One common cause of overheating is operation of the wipers in heavy snow.

The circuit breakers for the power door locks and power windows are located in the fuse box.

 
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