The brake light that has about five or six bulbs and shows in the rear window is out on my Buick LaCrosse 2006. The inspection guy says next time it won't pass inspection
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Wiring diagram for center high mount. Check voltage and ground. The white wire is voltage and the black wire is ground. The voltage comes from bcm. Use a test light, while somebody steps on the brake or use a heavy object on brake pedal. If there is voltage, the test light will light up. To check ground, black wire, with test light, Have test lite touching battery voltage, touch the black wire terminal, if the lite comes on, at least the ground is good enough to lite the test light. If you have good voltage and ground then I suspect the lamp assembly is faulty.
SOURCE: LED Brake Lights diming
I had the same problem with my 2004 TL, and it was the brake light switch. It is very easy to replace. (10 min) I ordered one from Rockauto.com for only $6.95. To replace: Remove the black cover under the steering wheel, down by the fuses (held in place by rubber pins and clips - no screws) Locate the switch on the arm of the brake pedal. Unplug the switch, twist the old switch out and install the new one - it's simple!
SOURCE: 2005 Toyota Sienna rear brake light problem.
have you checked the earthing continuity-if it's this other bulbs may also partly light when brakes used
otherwise-
Check continuity of live from center to lh & rh lights and/or is there a live at those lights
SOURCE: 2006 Kia Sorento Brake Lights not working
Apparently this is a recall matter and will be fixed at no charge. KIA Consumer Assistance Center 1-800-333-4542. Recall notices were to go out in May/June 2009.
SOURCE: 2002 Chevy Blazer, rear brake lights do not work
I had a similar problem and when i went to the auto electric place the guy said its a brake switch next to the brake pedal which is not working. He took it out and fixed it. Now its all fine.
SOURCE: parking lights work third brake light works,just not back brakes?
The bulbs do not need to be replaced! The answer to this problem is believe it or not in the turn signal lever, or multi-function switch. It is extremely common on these cars, and usually mis-diagnosed. Try this before going any farther. Back the vehicle up to a wall, or have a person stand behind the car, and pull the turn signal lever slightly towards you as if you were switching between hi and low beams. I guarantee that when you put just a little pressure on the lever your brake lights will work. If you want the problem fixed, you need to have the switch (and lever arm) replaced from inside the steering column, and you need someone to remove the airbag to do this. The switch is roughly $200 from an aftermarket parts store. If you learn to drive your car and just know that when you brake you can pull back on the lever to make the lights work great, I did for a few years in mine. But I guarantee that is the answer to your problem
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