Brake lights are not working

B J

MEMBER
1998 CHEVROLET BLAZER

My brake lights are not working. I was told to check turn signals and hazards light. Now they are not working. Checked all fuses both locations all ok.

Tuesday, June 15th, 2010 AT 11:41 AM

5 Replies

BLACKOP555

MECHANIC
10,386 POSTS

Is the third brake light working?

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Wednesday, July 28th, 2021 AT 1:34 PM

B J

MEMBER
3 POSTS

Yes, also turn and hazzard lights work

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Wednesday, July 28th, 2021 AT 1:34 PM

BLACKOP555

MECHANIC
10,386 POSTS

When that happens its a common thing that the turn signal switch has failed. The brake lights are tied into it and thy it works. Turn the third one bypasses it which is why it works.

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Wednesday, July 28th, 2021 AT 1:34 PM

B J

MEMBER
3 POSTS

Thanks that fixed it.

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Wednesday, July 28th, 2021 AT 1:34 PM

KASEKENNY

MECHANIC
18,907 POSTS

Just so that we have some documentation to go with this in case others have this issue, here is a guide that will help with how to figure this out:

https://www.2carpros.com/articles/how-to-check-wiring

Also, below is the wiring diagram that you will need to find the specific circuits needed to determine if the switch is the issue. Basically you need to test voltage coming out of the switch at the fuses.

Please let us know if you have questions on this. Thanks

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