76 F100 reverse light issue.
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5th Wheeling
Joined: Apr 2022
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. That being said, we MIGHT have created another problem. Now his turn signals don't work (flashers work fine). Not the front or the back. The tail lights work as do the brake lights but none of the blinkers blink. We didn't touch any other wiring. We only cut the old backup light sockets out and heat shrunk the end of those connections and then ran new power and ground wires. Is it necessary for those old wires to go to something for the blinkers to work?Last edited by Hyperguy; Apr 27, 2022 at 06:26 PM.
Lead Driver
Joined: Jul 2017
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From: San Jose, CA
Not really. Just the grounds.
Without good grounds some of the lights might still work when they find an alternate ground source through the opposite filament. But that usually means the lights are very close to the same brightness, so if you see a distinct dim for running lamps and bright for brakes, the grounds are probably still good.
Your '76 has the plastic tail light housings with integrated lenses, correct? Or does your truck have the steel housings/reflectors with separate lenses?
Paul
Without good grounds some of the lights might still work when they find an alternate ground source through the opposite filament. But that usually means the lights are very close to the same brightness, so if you see a distinct dim for running lamps and bright for brakes, the grounds are probably still good.
Your '76 has the plastic tail light housings with integrated lenses, correct? Or does your truck have the steel housings/reflectors with separate lenses?
Paul
Lead Driver
Joined: Jul 2017
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From: San Jose, CA
Sorry, you said the flashers work? Ok, then try swapping the flasher units and see if the problem follows.
It might not even have been something you did and is just one of what we call a "coincidental failure" where you just happen to be on the last legs of something and it dies while you're working on other things.
worth a check.
Paul
It might not even have been something you did and is just one of what we call a "coincidental failure" where you just happen to be on the last legs of something and it dies while you're working on other things.
worth a check.
Paul
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5th Wheeling
Joined: Apr 2022
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Sorry, you said the flashers work? Ok, then try swapping the flasher units and see if the problem follows.
It might not even have been something you did and is just one of what we call a "coincidental failure" where you just happen to be on the last legs of something and it dies while you're working on other things.
worth a check.
Paul
It might not even have been something you did and is just one of what we call a "coincidental failure" where you just happen to be on the last legs of something and it dies while you're working on other things.
worth a check.
Paul
s!
Cargo Master
Joined: Jul 2005
Posts: 2,313
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From: Kansas
if the brake lights and flashers work, the wiring/grounds/sockets/bulbs are fine. you need to focus on the turn signal circuit from the fuse box to the flasher to/thru the turn signal switch...
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5th Wheeling
Joined: Apr 2022
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We will have to get under there tomorrow when there's some light. I'm hoping that it's not the turn signal switch as that looks like a PITA to change out. Lol.
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fatfingers
1948 - 1956 F1, F100 & Larger F-Series Trucks
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Jul 25, 2008 07:33 AM
