Question about 1987 Toyota MR2

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I am having a brake light problem--all are out. I think the switch is working. With the brake fuse out, I get a 12 volt read across the fuse terminals when the brake pedal is depressed. I think if the brake light switch was bad that I would not have a reading when the pedal is depressed. Is there a relay or something that could be interfering with the circuit. I have tested the wiring at the rear of the car and the lights all come on with a jumper. Thanks

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Using a test light, depress brake and see if have 12+ on both wires, when release brake pedal should only have 12+ on one wire, if only have 12+ on one wire then switch is bad.
If you are using a multi-meter, put your negitive on a known ground to test wires

Posted on Feb 07, 2010

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