Question about 1983 Ford Fairmont

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Brake lights failing

Brake lights dont work and battery indercator keeps going up and down

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Both issues would seem to be a loose/corroded connection and most probably the grounding. The brake light is part of the taillight. Most taillights operate with dual filament bulb (3 terminal). The metal body of the bulb bottom is usually connected to the body ground. The correct procedure would be to trace the wiring harness from the taillight and determine which is the ground and verify that the contacts are clean and free of corrosion. An alternative is to add a grounding wire from said metal body of the taillight bulb and attached to any bare metal/chassis/body in the rear. The same loose ground could cause the inconsistent battery indicator.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jun 09, 2008


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