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Toyota Repair/Brake lights inop

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Expert: Ted Ritter - 11/11/2009


Question
QUESTION: I have a 1990 Camery that the brake lights do not work. Have changed out brake light switch but still inop.  Checked voltage to wire off switch has 12V but when switch or jumper wire plugged in the circuit shows to have a ground what was once the power side  Can you shed some light on subject possible problems with turn signal switch?          Thank You Phil

ANSWER: Can you tell me which wire color shows 12volts and which shows ground with the brake pedal not depressed.

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QUESTION: The green wire with a white stripe has voltage with the brake switch disconnected and the solid green and the green wire with the switch or jumper wire connected both show to go to ground.

Answer
This should also blow the stop light fuse, has it been checked, if it is blown then it would confirm the short circuit that probably exists at the rear brake/tail light sockets, disconnect the tail light wires completely from the wire harness and see if the fuse still blows, if it stops blowing then the problem is a short cicuit in the brake /tail light assemblies.

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Ted Ritter

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I have more than 28 years experience as toyota technician, I will be able to answer most questions related to the Toyota product line up to the present year models,I am located in the US but welcome questions from other regions of the world. When asking a question please provide specific information: year,model, engine,transmission information. Provide as much information as possible including a brief repair history if possible. I have been a volunteer here for almost ten years an have answered over 16,000 questions helping Toyota owners with their problems without any compensation, some of my answers are published on many other websites via google and other search engines. AllExperts recently added a new feature which allows questioners to donate to experts on the site, any amount of donation is very much appreciated, to make a donation just click on the DONATE button.

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Toyota technician since 1979,expert in electrical systems,OBD systems,engine repair, driveability problems,EFI systems,ASE certified,Toyota master technician.
Certified Hybrid Vehicle technician.

Education/Credentials
Toyota master technician, ASE certified in eight catagories, Hybrid vehicle certified. Toyota technical training: Engine Automatic transmission Manual transmission Drivetrain Electrical systems Brakes and chassis Air conditioning Engine performance and diagnostics Hybrid systems

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