Wired Brake/Running light problem
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Wired Brake/Running light problem
Have a 1972 ford f100, To start off i havent looked that much into this problem yet. Been busy with other parts on the truck.
Problem is my passenger brake light works, but not the running light and my driver side running light works but not my brake light. im not sure if its a fuse that blown out and to be honest im not 100% sure where the fuses would be.
any tips will be greatly appreciated
Thanks!
Problem is my passenger brake light works, but not the running light and my driver side running light works but not my brake light. im not sure if its a fuse that blown out and to be honest im not 100% sure where the fuses would be.
any tips will be greatly appreciated
Thanks!
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Branden17, Welcome to FTE & the Bumpside Forum. 
If you have tail light on one side but not the other, power is back there so likely it is a bulb.
Brakes & turn signals share same filament in the bulb, so likely bulb again if the left turn blinks on the front.
Get a circuit tester like the one below so that you can test for current flow.
John
If you have tail light on one side but not the other, power is back there so likely it is a bulb.
Brakes & turn signals share same filament in the bulb, so likely bulb again if the left turn blinks on the front.
Get a circuit tester like the one below so that you can test for current flow.
John
Hotshot
Joined: Mar 2013
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From: Phoenix, Az.
You did put 1157 bulbs back there, correct? I know there is another dual filament bulb that won't work right.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
In that case I would be willing to bet the lamp wiring at the left rear corner has been *******ized by your PO. That's where everybody likes to blend wiring for trailor lamps in. Check connections there.
Fleet Owner
Joined: Jun 1999
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From: Creedmoor, North Carolina
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Fleet Mechanic
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The bulb sockets are also suspect. I've had to add solder to the bulb contacts for them to work.
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From: Ohio
Ditto on the wiring. Look on the rear drivers side frame rail(inside), you'll find the original 4 pin plug that is for the tail lights. Make sure someone hasn't gotten their fingers in there and screwed something up.
You can check for power at that connection using the tester John showed you.
Listing of the four wires:
LEFT turn signal(including brake light on that side)
RIGHT turn signal(including brake light on that side)
Running lights(both sides and license plate light)
Reverse lights
You can check for power at that connection using the tester John showed you.
Listing of the four wires:
LEFT turn signal(including brake light on that side)
RIGHT turn signal(including brake light on that side)
Running lights(both sides and license plate light)
Reverse lights
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