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There's continuous power supplied to the circuit. When the switch contacts, it closes the circuit and allows the power to go to the brake lights.
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∙ 9y ago
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1985 bronco brake lights dont work but all other lights do work you replaced brake light switch and bulbs?
Check the brake light fuse. If you have 12 volts at the brake light switch I would suspect the signal light switch is at fault.
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Bad switch, bad wiring, ECM fault. If your jake brakes still work, you can rule out the accelerator position switch. The brake position switch might be reading that the brake is depressed when it isn't.
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Your fuse could be blown, or the brake light switch is improperly adjusted.
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The brake lights and the tail lights are separate circuits. Check the brake light fuse, then check the brake light bulbs, then check the brake light switch.
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Check the brake light fuse, the bulbs, the brake light switch and last, check the signal switch.
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Check the brake light switch on the brake pedal. Might have to replace it.
