n2racing

I have a customer that brought this in when he was pulled over by the police. The brake lights burn bright when turning on the headlights. When I unplug the the wiring harness at the left rear the right tail lamp lights up as regular tail lights the left turns off. The voltage at harness when tail light on is 10 wheras the voltage when the brake lights are on is 8.65. Really strange.
Any Help? Thanks.

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jdmccright

There's probably a short in the wiring harness going to the rear light assemblies...making the bright stop filaments to turn on instead of the dimmer ones in the bulbs when the headlights are turned on. Concentrate on where the loom might be constantly flexed from a door or hatchback opening & closing. Hope this helps!

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Current Garage:
2003 Pontiac Vibe 1.8L AWD
2003 GMC Envoy XL (aka "fat-a$$") - K&N air filter, otherwise stock.
1995 Chevrolet C2500 2wd, 5.7L - K&N air filter, otherwise stock...my weekend hauler.
1992 Toyota Camry LE 2.2L - K&N air filter.

Vehicle History:
2004 4.7L Dakota Quad Cab 4x4
1996 GMC Jimmy 4wd
1992 Chevrolet S10 Ext. Cab 4.3L
1995 Honda ST1100...my first (and only) new vehicle.
1980 Yamaha XS400
1980 Mercury Bobcat...my first car.