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NEED HELP FAST....

Discussion in 'Tow & Trailer' started by BlazerWheels, Nov 26, 2003.

  1. BlazerWheels

    BlazerWheels 1/2 ton status

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    On my trailer I have brake lights, running lights, left and right turn signals...when the running lights are on and the brake is pressed, the lights go off. Only to come back on when the brake is released. Is this a grounding issue? Crossed wire? Something else? /forums/images/graemlins/confused.gif Need help fast as We are leaving this afternoon....

    Thanks in advance. /forums/images/graemlins/thumb.gif
     
  2. willyswanter

    willyswanter 1/2 ton status GMOTM Winner

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    Do the brake lights work fine when the running lights are off?

    Do all the running lights go off or just the tail lights when the brake pedal is pressed?
     
  3. BlazerWheels

    BlazerWheels 1/2 ton status

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    [ QUOTE ]
    Do the brake lights work fine when the running lights are off?

    [/ QUOTE ]
    Yes. Brakes work as normal when running lights are off.

    [ QUOTE ]
    Do all the running lights go off or just the tail lights when the brake pedal is pressed?

    [/ QUOTE ]
    It is a small trailer, so the only light on it are the tail lights. But yes they go out completely.
     
  4. kennyw

    kennyw N9PHW Premium Member

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    Sounds like a grounding problem to me. At least that is what I would start with.
     
  5. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Check the wiring to the lights. Sounds like you have a crossed wire. The bulbs have a common ground. If you wired one of the power leads to the ground, you could see behavior like this. That's my best guess...
     
  6. BlazerWheels

    BlazerWheels 1/2 ton status

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    I will check this out. Thanks.
     
  7. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    I just realized, I should have qualified that with "as long as you have it grounded". Sounds to me like your getting an intermittent ground through the switch in any case... The loop ground is not there when the switch is "on" so the lights go out when both are energized. Make sense?
     
  8. 83ZZ502_Jimmy

    83ZZ502_Jimmy 1/2 ton status

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    It is def. a ground related problem.. Check your ground to the tow rig.

    I have had this exact problem many times. It is the Ground. /forums/images/graemlins/thumb.gif

    John
     
  9. BlazerWheels

    BlazerWheels 1/2 ton status

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    Just wanted to say thanks for all of the replys. I found the problem...the lights had lost a bulb /forums/images/graemlins/ignore.gif /forums/images/graemlins/blush.gif...I thought my dad checked that. OH WELL, just a reminder to check the obvious first.
     

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