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Big electrical problem

Discussion in 'Chevy Trucks' started by B&E snowplowing, Feb 4, 2009.

  1. B&E snowplowing

    B&E snowplowing Senior Member
    Messages: 159

    I have a 95 GMG 2500 My problem is that I have no running lights, no taillights and no dash lights until I press the brake pedal, and it dosen't matter wheather I have the headlight light switch on or off.

    Any help would be appreciated. Thanks in advance.
  2. augerandblade

    augerandblade PlowSite.com Addict
    Messages: 1,054

    First thing I would do is check for proper ground by running a cable from the negative side of the battery right to the ground wire on the lights. Check for proper ground to your firewall.
  3. lawnmedic

    lawnmedic Senior Member
    Messages: 703

    I would bet broken ground somewhere.
  4. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Do you have a trailer plug/harness? I just fixed a suburban that the running lights would not shut off. She backed into a snowbank and two tabs were pushed together. I would disconnect the entire rear lighting harness under the tailgate to start, and your electric brake controller.
  5. BigDave12768

    BigDave12768 PlowSite.com Addict
    Messages: 1,446

    Thats a blown fuse. Not a major electriacl problem
  6. damian

    damian Senior Member
    Messages: 330

    check for a rear tail lamp bulb filament bridged to the brake lamp filament,this would make the park lamps/dash lamps come on with the brake lamps,then replace the park lamp fuse,let me know how you did,good luck.
  7. damian

    damian Senior Member
    Messages: 330

    also forgot to mention,the tail lamp units on your truck have been troublesome,the have plug in boards that have had corrosion-short-open problems if you find those to be the problem,aftermarket replacements are cheep,just replace both tail lamp units.good luck.
  8. ogdenflooring

    ogdenflooring Member
    Messages: 92

    VERY FIRST thing to check LOL
  9. B&E snowplowing

    B&E snowplowing Senior Member
    Messages: 159

    Thanks for all the help...Once I removed the trailer lights wiring harnes everything started to work fine again. The wiring harness look ok, but I decided to remove it, because the fuses were good and the grounds and bulbs all seemed ok. Once again thanks a bunch