Question about 1993 Ford F150 SuperCab

2 Answers

93 ford f150 brake lights stay on with switch disconnected go out only with fuse removed

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  • yadayada
    yadayada May 27, 2010

    check and replace the parking brake switch

  • morton_grigg May 27, 2010

    the brake lights stay on even with the brake light switch unpluged with the fuse out they go out I am guessing the problem is under the dash somewhere

  • morton_grigg Jul 07, 2010

    Thanks for the help guys!! We found the problem.
    There was a bad wire about 2 feet from the lamp assy causing the short couldn't see it without striping the electrical tape off.

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No damaged wires just replace switch.

Posted on Jul 07, 2010

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  • Ford Master
  • 22,219 Answers

Damaged wires somewhere ,best advice is to just rewire them

Posted on May 27, 2010

  • Colin Stickland
    Colin Stickland Jul 07, 2010

    well glad you found the problem ,had an idea it might have been some damaged wires ,but as usual without my greasy hands on the vehicle its difficult to diagnose,also remember that american vehicles have a funny witing set up ,like the flasher and the brake light are all in one and it means i have to rewire and fit new indicator lights on older imports ,looks horrid but its the homoglonation laws here .

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Need diagram for f150 1976 wire attachment to break pedal, replaced slave cylinder abad now lights are on constant.


Mcmom, Either your brake pedal is not coming up far enough to the brake switch, or the brake switch is faulty. You may still have air in brake system not allowing pedal to come up high enough to contact switch, pull brake pedal all the way up and have a second person see if brake lights go off.
Links below to show brake switch location and show how brake pedal arm should come all the way up to turn off brake lights.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."


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disconnect turn signal switch wires @ column, put power to wires to brake lights. that cks wiring to lights. next put power to wires through turn signal to ck switch. Power runs from brake light switch to turnsignal switch, to lights.

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