Question about 2005 Cadillac CTS

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The third brake light (the bar in the hood) in my 2004 Cadillac CTS does not light when the brakes are applied. I see other cars of the same year and make with the third light out also. Does the entire bar go out if one bulb is bad or is it probably something else?

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The bulbs are light emitting diodes so if one goes bad the rest stays lighted up. The power invertor for your 3rd brake light is at fault

Posted on May 27, 2010

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You have to replace it. they are sealed units and very expensive. they have neon tubes inside and i have seen on the internet about people converting them to LED. I have one that i am willing to sell that only the right side works. ( it needs repairing) rcale@live.com

Posted on Nov 08, 2010

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1 Answer

Why my2004 Cadallic cts brake lights wont work or shift out of park?TC lig


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2003 Cadillac CTS - the car won't shift from park if you start it and don't have your foot on the brake. Also, the traction control warning light is always on, and the over-hood brake light works, but the...


sounds like you have a bad brkae light switch, which is located on the brake pedal assembly. a bad switch will not let you shift out of park and you will not have any brake lights as the car does not recognize that the pedal is being pushed and brakes engaged. easy to replace switch if you are handy, if not this is a inexpensive repair at any mechanic. hope this was helpful is so please rate 4 thumbs.

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I have 2006 cadillac CTS 2.8 v6. Two side brake lights went out and don't work only when you use brake pedal, when i use the alarm on the car they flash like they should so the lights are fine. The light in the middle works fine so do the turn signals.

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