Tail Light Problem
Thread Starter
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Elder User
Joined: Apr 2010
Posts: 645
Likes: 2
From: Richlands, NC
Tail Light Problem
Hey guys.
I have a 1990 Ford Bronco, full size, 302 V8.
The tail lights won't work.
Well, let me start at the beginning.
Headlights, turn signals, brake lights, all work.
No tail lights.
The fuse blew. So, I replaced it, and I had rear running lights. Turned on the turn signal with the lights on, it blew the fuse.
...Weird, right?
What's causing that, you think?
I have a 1990 Ford Bronco, full size, 302 V8.
The tail lights won't work.
Well, let me start at the beginning.
Headlights, turn signals, brake lights, all work.
No tail lights.
The fuse blew. So, I replaced it, and I had rear running lights. Turned on the turn signal with the lights on, it blew the fuse.
...Weird, right?
What's causing that, you think?
Thread Starter
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Elder User
Joined: Apr 2010
Posts: 645
Likes: 2
From: Richlands, NC
Well, last night with the turn signal was just a coincidence.
I put in a new fuse, turned on the lights..
1..2..3..
The fuse blew
Tried it again.
1..2..3..
The fuse blew again.
Both times the fuse blew without the turn signals on.
I put in a new fuse, turned on the lights..
1..2..3..
The fuse blew
Tried it again.
1..2..3..
The fuse blew again.
Both times the fuse blew without the turn signals on.
Thread Starter
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Elder User
Joined: Apr 2010
Posts: 645
Likes: 2
From: Richlands, NC
#4 on the diagram.
Top right hand corner.
Well, in the truck, it's turned so the flashers are at the bottom left..
Top right hand corner.
Well, in the truck, it's turned so the flashers are at the bottom left..
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Elder User
Joined: Sep 2006
Posts: 519
Likes: 1
From: Bountiful UT
Get a resettable circuit breaker, or just a handfull of fuses, when they are on before the fuse pops see if one of the lights is not working or dim. that will tell you where the short is.
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Cargo Master
Joined: May 2004
Posts: 3,007
Likes: 5
another way to do it is to take all the bulbs out of the rear tail lights, then put them back in one at a time until the fuse blows. Go from there.
If it blows before any bulbs are put in then the wiring is shorted to ground probably where something was connected wrong.
If it blows before any bulbs are put in then the wiring is shorted to ground probably where something was connected wrong.
Thread Starter
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Elder User
Joined: Apr 2010
Posts: 645
Likes: 2
From: Richlands, NC
And if one of the lights are out, what do I do then?
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
Remove the load as g_k50 suggested. That is the least troublesome method and will pinpoint the problem. Otherwise you are chasing "gremlins" and will need to buy stock in Bussman Fuse Co. before you find and resolve the issue.
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