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Brake light not working (bulb is fine)

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Old 10-21-2023, 08:57 PM
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Default Brake light not working (bulb is fine)

Searched the forum and couldnt find an answer. Apologies if this has been covered before...

My driver-side brake light wont light up. Bulb is fine. The other lights in both tail assembly all work (running light, blinker and the brake on passenger side). Any ideas how to fix?
 

Last edited by Trailmix; 10-22-2023 at 05:19 PM.
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Old 10-22-2023, 02:39 AM
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Did you check the fuses?
 
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Old 10-22-2023, 05:20 PM
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Originally Posted by mollusc
Did you check the fuses?
I checked fuse in the main box under the steering column. It was fine. Is there a fuse in the tail assembly itself?
 
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Old 10-22-2023, 10:56 PM
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Years ago I had a brake light or turn signal not working with symptoms like you describe. I don't recall which it was. It turned out there was corrosion in the socket where the bulb was installed, so check for corrosion in the socket and behind it where the harness connector plugs into the assembly. Sometimes the act of unplugging and reattaching a connector can provide just enought "scrape" to get a circuit working again.
 
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Old 10-23-2023, 09:19 AM
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Agreed with MLN01 - I had a similar issue where the brakes would light up the running lights and all sorts of other weird lighting issues in one of the taillights. Ended up being a corroded ground on one of the bulb sockets that was causing the light to ground through another light circuit. Bending the tab out a little after hitting it with some sandpaper fixed that issue.
 
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Old 10-23-2023, 10:57 AM
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Originally Posted by V50-M66
Agreed with MLN01 - I had a similar issue where the brakes would light up the running lights and all sorts of other weird lighting issues in one of the taillights. Ended up being a corroded ground on one of the bulb sockets that was causing the light to ground through another light circuit. Bending the tab out a little after hitting it with some sandpaper fixed that issue.
Originally Posted by mln01
Years ago I had a brake light or turn signal not working with symptoms like you describe. I don't recall which it was. It turned out there was corrosion in the socket where the bulb was installed, so check for corrosion in the socket and behind it where the harness connector plugs into the assembly. Sometimes the act of unplugging and reattaching a connector can provide just enought "scrape" to get a circuit working again.
ok ill try this and report back. Im out of town, away from car for a few days, so will respond this weekend.
 
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Old 10-28-2023, 08:49 AM
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The mystery deepens.

Both sockets look new. No corrosion.
both bulbs work.
all fuses are good.

1) when applying brake, bottom bulb lights.
2) when headlights on, bottom bulb lights very bright but applying brake has no impact.
3) when use left blinker, top bulb lights.

So, the issue is that when my headlights are on and i apply brakes, theres no brake light.
 

Last edited by Trailmix; 10-28-2023 at 08:54 AM.
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Old 10-28-2023, 09:26 AM
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Sounds like you have the brake bulbs rotated by 180 degrees so the wrong filament is lighting for the tail lights. The bulbs should have offset bayonet lugs to prevent this, but on my '99 it was very easy to put them bulbs in the wrong way around.
 
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Old 10-28-2023, 11:14 AM
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Originally Posted by mollusc
Sounds like you have the brake bulbs rotated by 180 degrees so the wrong filament is lighting for the tail lights. The bulbs should have offset bayonet lugs to prevent this, but on my '99 it was very easy to put them bulbs in the wrong way around.
no, thats not it.
 
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Old 10-28-2023, 02:04 PM
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Corrosion in a plug somewhere along the way can do strange things.
 


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