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1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

Blowing brake light bulb

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Old Nov 26, 2021 | 05:28 PM
  #1  
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From: Bassett Virginia
Blowing brake light bulb

Hi guys. Been a long time since I've been on this forum. I haven't been driving my truck much, but I'm gonna try and change that a little.

So the last couple of times I've drove my truck, I keep blowing the brake light bulb on the drivers side. I even went ahead and replaced the whole brake light assembly with a new Dennis Carpenter one and it still blew the bulb. Could it be just a bad ground wire? I have traced the wires and didn't see any signs of wear, so I guess I will have to crawl back under and look again.

Anyone else have this problem before and found a fix?
 
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Old Nov 27, 2021 | 08:49 PM
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Never heard of that before.
Is it the brake / turn part of the bulb and / or the tail light side?
Have you checked what the voltage is going to that bulb?
What if you use the bulb from the other side will it blow also?
Dave ----
 
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Old Nov 28, 2021 | 10:22 AM
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When you crawl underneath, check for a rubber 3 wire connector at the rear drivers side. Looks like a trailer connector. Check it for corrosion, clean it with a small wire brush then put a little dielectric grease on it. I had that problem on my '72, but the whole harness in that corner needed to be replaced.
Hope this helped.
 
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Old Nov 29, 2021 | 07:49 AM
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From: Bassett Virginia
Originally Posted by Dans72
When you crawl underneath, check for a rubber 3 wire connector at the rear drivers side. Looks like a trailer connector. Check it for corrosion, clean it with a small wire brush then put a little dielectric grease on it. I had that problem on my '72, but the whole harness in that corner needed to be replaced.
Hope this helped.
OK, I was kind of figuring it was a connector. I will go through the wiring connector and recheck ground wires in a couple of weeks when I get my truck back out of storage.Thanks
 
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Old Dec 3, 2021 | 08:25 PM
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Also check to make sure the bulb in there is an industry number 1157.
 
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Old Dec 5, 2021 | 10:05 AM
  #6  
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From: Bassett Virginia
Originally Posted by JEFFFAFA
Also check to make sure the bulb in there is an industry number 1157.
I will look at it in a couple of weeks. I'm sure its the correct bulb because it came already installed in the housing from Dennis Carpenter.
 
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Old Dec 5, 2021 | 05:50 PM
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I find bulbs are hit and miss on quality. I finally bought a box of hella 1157 and 1156 bulbs. I hope they are high quality.
 
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