Question about 1986 Ford F150 SuperCab

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1986 F150 Brake Lights don't work.

Hi I have a 1986 F150. I do not have any brake lights at the rear of my pickup. I have checked all of the fuses and they are good. I have taken a test light to the back plug. I can get turn signals and running lights and reverse lights off of the plug.

If I just have someone push on the brakes I get no lights anywhere on the plug.

Here is what has got me though. If I turn on my turn signal either way the other side will light the brakes. So to make more sense if I turn on my left turn signal I will get the signal and the right brake light will also come on.

Does this make sense to anyway?? Could it be my brake switch?? If not where should I begin?? I am pretty sure that my brake light signal runs down my turn signal wire is that correct?

Thanks in advance for any input.

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Im not clear about what you have tested completely. It sounds like you have tested the trailer plug? Or did you test the plugs that go into the light assemblies? From what I have gathered I would try testing for a good ground at that plug. Also if you put on the directional for the right side and it causes the left to eluminate then I would guess either a bad ground or a short in the wiring. But I would guess a bad ground. If you can give me more info I will try to help more. Thank you.

Posted on May 30, 2009

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I would look at your brake light switch if you say all the fuses are good.look above where you put your foot on the pedal you should see a switch on a bracket so that when the pedal is pressed the plunger on the switch moves out and makes the lights come on. link the cables together that go on the switch and the brake lights should come on. if they dont check at the switch to make sure that one of those cables is live, the other one should go to the lights at the back. hope this helps.

Posted on Apr 24, 2009

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