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Brake light non function

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Old Oct 25, 2019 | 04:15 PM
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Default Brake light non function

C3 1977 the brake lights don't come on. Bulb, switch and fuse are all OK. What is likely the issue?
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Old Oct 25, 2019 | 04:32 PM
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check the GROUNDS! at the tailights....they are grounded to the frame.
Unkahal
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Old Oct 25, 2019 | 04:38 PM
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I would guess the brakelight switch under the dash. Wait till you see it. 99% plastic. Rather disappointing for a superb car anyway. There is a way to test the switch with a meter but don't ask me how.
Its a challenge to remove the switch if you need to. A new unit can be had from several vendors. There are two versions I believe, one w/cruise control and one w/o.

Last edited by HeadsU.P.; Oct 25, 2019 at 08:15 PM.
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Old Oct 25, 2019 | 04:41 PM
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a volt meter with 'continuity beep' function is all that is need for the BLS.
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Old Oct 25, 2019 | 07:41 PM
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Originally Posted by lentzfam
Bulb, switch and fuse are all OK. What is likely the issue?
Had a similar problem with my '73 years ago. I checked all grounds first and couldn't find the problem. It turned out the fuse holder contacts were tarnished and not allowing the fuse to make good contact. Had to clean the contacts.

DC
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