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parking light fuse blows,no plow lights

Discussion in 'Fisher Engineering Discussion' started by swampguy, Jan 11, 2011.

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  1. swampguy

    swampguy Junior Member
    Messages: 3

    Hooked my mm1 of ten years.I have power to plow but when I turn on the lights, the truck lights stay on. And the parking lights go out,and the dash lights are out also.The fuse under the dash is blown. I replaced the fuse and it pops if I turn on the lights. When the plow is not connected the lights all work Thanks
     
  2. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,239

    You have a short somewhere.Have you started tracing wires?
     
  3. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,037

    Ditto, I would go directly to where the lights plug into the light harness, examine thoroughly for breaks, pinching, looses connection.....don't forget the park lamp splice as well.
     
  4. B&B

    B&B PlowSite Fanatic
    Messages: 12,777

    I'd go for the plow side parking light/turn sockets first. They have a bad habit of crumbling to dust then the bulb pins short out on the socket housing.
     
  5. swampguy

    swampguy Junior Member
    Messages: 3

    I have traced the wires they seem to be fine but will dig deeper. the 9 pin connecter looks clean, no breaks or bare wires . Could it be the modules? I am going to pull the instructions out and go over the wiring diagrams. Will keep you posted.
     
  6. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,239

    The wires could be broken inside the harness
     
  7. swampguy

    swampguy Junior Member
    Messages: 3

    Well I checked the lights and they are clean. Because of the snow storm I needed to move on[8'and falling fast]'. So I cut the brown fed line from the truck harness,cut the low beam fed line to the plow head lights and hot wired it so I could plow all night,and today. Bad storm in NH 24'' and it came fast. Will check continuity of Wiring. I think a new harness is in order Thank you and this site has been a life saver.I have fixed several problems with help from all you great folks
     
  8. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,239

    let us know if the harness fixes the problem