Brake Light Help ASAP
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Senior User
Joined: Nov 2009
Posts: 125
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Brake Light Help ASAP
1965 F100
The brake light on the pass side and blinker not working..blinker in front is
Its not the bulb I got 2 new ones and the bulb works in the driver side
The RUNNING light is WORKING but no brake, brake is running and blinker is working on driver side
Its also not the housing, I unpluged it and went to a friends that has a wrecked 64 parts truck and took that tail light housing off and plug it up to my truck and SAME PROBLEM
No brake light but has running lights!
Cant be in the wiring or i would have running light..RIGHT?
The brake light on the pass side and blinker not working..blinker in front is
Its not the bulb I got 2 new ones and the bulb works in the driver side
The RUNNING light is WORKING but no brake, brake is running and blinker is working on driver side
Its also not the housing, I unpluged it and went to a friends that has a wrecked 64 parts truck and took that tail light housing off and plug it up to my truck and SAME PROBLEM
No brake light but has running lights!
Cant be in the wiring or i would have running light..RIGHT?
Tuned
Joined: Aug 2008
Posts: 413
Likes: 2
Check voltage at connections. There is a cross over connector from the drivers side to the passenger side at the rear of the truck. At the beginning of the tail light harness, ( which is located under the hood ), there should be a 3 conductor plug. A green wire, a yellow, and a brown. Check voltage coming from the cab into this harness. You may have a bad connector or broken wire to the right rear.
The running light is the brown wire, drivers side brake and directional is yellow, passenger side brake and directional is green.
The running light is the brown wire, drivers side brake and directional is yellow, passenger side brake and directional is green.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
vol, Many times trailer lighting is added, and problems can come in that area. There are 3 wires to the rear of the truck, the brake & turn signal share left & right. There is a factory plug off the end of the drivers side frame rail. Find & unplug it, use a circuit tester to see if blinking can be found for left & right there. If yes, re connect look further for trailer light plug. 98% of the time that is where issues are.
If you don't find a pulse at the end of the frame rail follow the wire to the front of the truck.
Let us know what you find.
John
If you don't find a pulse at the end of the frame rail follow the wire to the front of the truck.
Let us know what you find.
John
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