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Old 02-17-2008, 10:20 AM   #1
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Lightbulb Exterior brake lights stay on (right, center, and left)

With the transmission in Drive and no pressure on the brake pedal, the exterior brake lights are still on.

This is not a problem caused by the brake pedal switch (both of the plunger switches located at the pedal test ok). With the car ignition on and the transmission in park, no pressure on the brake pedal, the brake lights are NOT on. Pushing the pedal causes the brake lights to come on and causes the solenoid release pin to activate, allowing the transmission selector to be moved out of park. If the selector is left in park, releasing the brake pedal causes the brake lights to go out, that part of the brake circuit seems to be working ok. The problem with the brake lights staying happens when the transmission is moved out of park to any other position, including neutral and allowing the car to stand with no brakes on or to just coast, the brake lights still stay on when there is no pressure on the brake pedal.

I don't have a wiring diagram for the car, does anyone know where they can be obtained for free or low cost? It appears there may be a relay in the interlock circuit that connects the brake pedal switches, transmission selector switch, and ignition switch.

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Old 02-17-2008, 12:09 PM   #2
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One question, do the hazard lights work normally when out of park and foot off the brake. Just a shot in the dark here, I know it's part of that circuit. Could be something that simple!
Alot of times you can go to a public libary and look for the "Mitchell" automotive manuals that are printed for the Pro-machanic and they have very good wiring diagrams. If you find the diagram you can bustout a dime and use the copier!

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