Question about 1993 Ford F150 SuperCab

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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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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.
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Brake lights not working on my 1985 ford f150 after I replaced the brake switch

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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You might need a heavy duty switch or you got a bad switch

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Ford f150 brake light problems

You didn't say what year the truck is, so this answer may not fit.
Trucks made before 2000 often use a two wire switch, power goes out from the brake switch to the turn signal switch, then to the lamps. You might want to unplug the turn signal switch to see if the short is there. The lamps are grounded at the sockets.
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1996 ford f150 tail lights wont turn off

Sounds like the brake light switch under the brake peddle change it out should be okay.under 15 bucks at the parts store

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1 Answer

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check fuses in both fuse panels, then check brake light switch third brake light works off of brake switch too but diferent wire

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3 Answers

2004 F-150 brake lights stay on

Disconnect the brake pedal position switch. Did they go off? If yes, replace the switch. If no, then you probably have a bad multifuntion switch (the lever on the left side of the column). Disconnect that, if they're still on, then find the power source, there is a short somewhere.

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2 Answers

2006 f150 no brake lights is there a fuse and where is it

There is a fuse, probably under the hood, it also might not be the fuse.

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1 Answer

Ford F150 brake light stays on.

probaly the parking brake not fully released or the cable is sticking.
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