Brake Light issue
Thread Starter
Instructor
Joined: Mar 2010
Posts: 219
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From: Texas
Brake Light issue
Both of my blinkers work; I replaced the brake switch and still do not have working brake lights. Is it possible that I have switched the connectors on the brake light switch? Can't seem to understand what else can be wrong. Thanks in advance.
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
You should confirm that the BRAKE light fuse is good by checking for power on both sides of the clips that hold the fuse.
Then confirm that you have power into the brake switch and out of the switch with the brake pedal depressed.
Then check "P" at the harmonic connection.
Then confirm that you have power into the brake switch and out of the switch with the brake pedal depressed.
Then check "P" at the harmonic connection.
Team Owner
Joined: Jun 2001
Posts: 23,375
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From: Virginia USA
Also make sure the switch is adjusted correctly and that you didn't get a "bad" new switch. When mine went bad years ago It took three to get one that worked from the local auto parts store.
Le Mans Master
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
You can test that type of fuse by grounding one end of your test light and probe the metal slit to the left and right of the fuse rating.
Thread Starter
Instructor
Joined: Mar 2010
Posts: 219
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From: Texas
I went to autozone and got more 20A fuzes and hazard fuse. I wiggled the 20A STOP HAZ fuse and my light started beaming in the back, then it started to smoke so I yanked the fuze out. I went to put in another fuse and it sparked so i disconnected the brake light switch and now I am at a loss what to do 
Le Mans Master
Joined: Aug 2006
Posts: 7,427
Likes: 1,560
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
I went to autozone and got more 20A fuzes and hazard fuse. I wiggled the 20A STOP HAZ fuse and my light started beaming in the back, then it started to smoke so I yanked the fuze out. I went to put in another fuse and it sparked so i disconnected the brake light switch and now I am at a loss what to do
Do the hazards work?
What happens if you remove the hazard flasher?
Are you working on a 1980?
Schematic:
https://docs.google.com/viewer?a=v&p...DQ1MmZlYzIwNDI
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Thread Starter
Instructor
Joined: Mar 2010
Posts: 219
Likes: 0
From: Texas
The turn signals work. I replaced the top hazard flash with a 552 however I haven't changed the bottom 552 yet.
The hazard flashers do not work.
I am working on a 1980.
That smoking fuse was a definite freak out.
The hazard flashers do not work.
I am working on a 1980.
That smoking fuse was a definite freak out.
Are you saying that the turn signals work properly?
Do the hazards work?
What happens if you remove the hazard flasher?
Are you working on a 1980?
Schematic:
https://docs.google.com/viewer?a=v&p...DQ1MmZlYzIwNDI
Do the hazards work?
What happens if you remove the hazard flasher?
Are you working on a 1980?
Schematic:
https://docs.google.com/viewer?a=v&p...DQ1MmZlYzIwNDI