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Brake lights inoperative except for 3rd brake?

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Old Jan 29, 2016 | 08:44 AM
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Default Brake lights inoperative except for 3rd brake?

I have a customer who recently installed our Halo LED tail lights and has reported the following as working

Running/parking lights yes
Turn signals: Yes
Hazards yes
Brakes no. But my 3rd brake light works


Any idea on what might be causing this? I'm having him check with his OEM bulbs for sanity's sake.
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Old Jan 29, 2016 | 08:55 AM
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Originally Posted by TheRadioFlyer
...Any idea on what might be causing this? I'm having him check with his OEM bulbs for sanity's sake.
That's where I would begin. Let us know how it goes

Last edited by GCG; Jan 29, 2016 at 08:56 AM.
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Old Jan 29, 2016 | 09:26 AM
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Major component wise it would seem to be the Hazard switch. Could also be a wiring issue between the Brake switch and the Hazard switch.






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Old Jan 29, 2016 | 10:01 AM
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Did he verify a fuse wasn't blown?
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Old Jan 29, 2016 | 10:21 AM
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Originally Posted by 3sACROWD
Did he verify a fuse wasn't blown?
Also having him check, but wouldn't that kill the 3rd brake light as well?
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Old Jan 29, 2016 | 10:31 AM
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Originally Posted by TheRadioFlyer
Also having him check, but wouldn't that kill the 3rd brake light as well?
No. They two are usually on separate fuses so if you blow one fuse you still have some sort of brake lights. I cannot read the schematic provided by Dadaroo to determine if hazard lights working means the fuse for the main brake lights is good.
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Old Jan 29, 2016 | 06:29 PM
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8VETTE7 you got me thinking (potentially dangerous) about my 2011 Silverado as I thought I remembered it having multiple fuses and I've encountered other cars with two fuses. So I was forced to GOYAGL (Get Off Your Azz And Go Look)

My Silverado actually has one fuse for each brake light. Evidently it wasn't the thing to do in 2003. At least not on the Corvette. (verified that too)

This forum is invaluable.
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Old Jan 30, 2016 | 07:59 AM
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I think I found the cause. The customer reported he previously had the euro-type tail lights on his car. If this is the case, he simply needs to re-connect the white wire on the brake switch.
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Old Jan 30, 2016 | 08:31 AM
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That would do it.

Mr. Sam
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