Question about 1992 Jeep Wrangler

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When i step on the brakes or use the left turn signal, all the running lights come on. I replaced the turn signal switch and removed the trailer wiring hookup. I unplugged the brake switch and it still does it when you use the left turn signal. The right turn signal works fine. Do I have to stop making left turns?

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  • Gary J Apr 03, 2011

    It has been working fine for the last 15 years. I was looking to find a spot where it may have rubbed threw and was grounding out.but everything was fine. No shorts. I installed a new turn light and same wireing as original and its still screwed up.

  • Gary J Apr 03, 2011

    Well, 2 months ago I replaced the bulb for the stop or signal. Two prong, can only install correctly, and it looked terrible. Was very discolored. never seen such a fryed looking bulb. So I replaced the whole thing today thinking the problem was there. No difference. So now I am thinking it may be some kind of "internal" problem. Like the computer has become confused? Im going to unhook the battery for a few days and see if it will "reset". Running out of ideas.



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Yes, you do unless you fix that botched wiring job. The left turn wire must be connected to the running lights wire in the back. Actually it could just be the wrong bulb or a socket that is shorted across the terminals. Try taking the left rear bulb out first to see if that stops the strange behavior. If yes, check out the socket and the bulb. If no, check the wiring to see if the blue/red wire is crossed somewhere with the light green/black stripe wire.

when i step on the brakes or use the left turn - jturcotte_1416.gif

Posted on Apr 02, 2011

  • 1 more comment 
  • Jeffrey Turcotte
    Jeffrey Turcotte Apr 03, 2011

    It's not grounding out--the 2 wires are crossed. Did the bulb you put in have 2 filaments in it and 2 contacts on the bottom? Does the socket have 2 distinct contact points in the bottom? Does the socket look like it has any heat damage? Where you had the trailer connection, how was that made and how did you take it off?

  • Jeffrey Turcotte
    Jeffrey Turcotte Apr 03, 2011

    The computer is not connected to the lighting circuitry in your jeep--there is no body control module. So did you change the socket and everything today? The cross up could be in the wiring harness somewhere between the dash area and the back end. The turn/stop wire comes down out of the steering column and the running lights comes from the headlight switch. Is your headlight switch on the turn wand? I thought it was separate, so i didn't put the 2 together until the wires join up to the harness going to the back.

  • Jeffrey Turcotte
    Jeffrey Turcotte Apr 03, 2011

    Sorry, I should have mentioned you can verify the crossed wires with an ohmmeter. Set your meter to ohms and connect the probes to those 2 wires going into the socket--the white and light green. With the bulb out, the resistance should be infinite. My guess is it's close to zero.



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