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lights mm2 not working

Discussion in 'Fisher Engineering Discussion' started by rtw511, Jan 26, 2014.

  1. rtw511

    rtw511 Junior Member
    Messages: 1

    hey folks I have a 2008 chevy Silverado 3500 with a mm2 on it the plows don't work , this problem started when a part in the plow light wiring harnees burned up. I have installed the new wiring harness. what happens is when I plug the plow in the plow lights the lights on the truck stay on and plow plow lights don't. asking help would be appreciated
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,392

    Might be missing the gnd signal
  3. kimber750

    kimber750 PlowSite Veteran
    Messages: 4,679

    Did you check the fuses by the module?
  4. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,288

    That hurt to read :dizzy:

    I'm assuming you replaced the light wiring harness for the truck? Did you remember to plug the connector with black wire/orange strip from the light harness into the control harness that should go to the first port of the isolation module? Like kimber said check your fuses by the module and also check your grounds at your solenoid and the ground on the motor of the pump.