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MM11 on 93 dodge. no low beams, 1 high!

Discussion in 'Fisher Engineering Discussion' started by tobaccogrower, Jan 17, 2011.

  1. tobaccogrower

    tobaccogrower Junior Member
    Messages: 2

    decided to turn my farm truck into my plow truck. picked up the push plates and all wiring for $600. had it all mounted up and working in a afternoon.

    only problem is i only have 1 high beam on the driver side and half a low beam(dim) on the passanger side and driver low has power but is super dim! i checked all connections and still the same. took known good isolation module out of my other truck and same thing. got a configureation plug. tried it bolth ways and still the same. it was horrable plowing the last noreaster with 1 high beam. hopfully somone here can lend a hand. headlights are old single pb2. TIA for any advise!
  2. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,288

    Have you checked all your grounds to make sure they are tight? Any paint should be ground off for a good connection.Another thing have heard of is connector on the plow being corroded inside and cleaning them with a very small wire brush.
  3. buddymanzpop

    buddymanzpop Senior Member
    Messages: 603

    What are the light harness part #'s? What model Dodge? What vehicle headlight type?
    Last edited: Jan 17, 2011
  4. RepoMan207

    RepoMan207 PlowSite Fanatic
    from Maine
    Messages: 5,039

    exactly my thoughts, I would first determine if you have the right components for your truck. I assume for $600 you got these used?
  5. snowman123

    snowman123 Senior Member
    Messages: 205

    I had the same problem on my ford truck the wiring harness was set up for a dodge so i just changed the wires around so it would work for ford. You probably bought a harness that came off of a ford and is going on your dodge so you would have to change your wires around also if that's the case.
    Last edited: Jan 17, 2011
  6. tobaccogrower

    tobaccogrower Junior Member
    Messages: 2

    thanks for all the replys guys! great people, great site!

    i found the problem. the harness that plugs into the #2 port on the 4 port iso had a split wire right at the vehical/plow connector. $174 from dealer. everything works like it'supposed to now. got it fixed just in time for the ice storm here in conn.
  7. buddymanzpop

    buddymanzpop Senior Member
    Messages: 603

    A good way to protect the wiring at that vulnerable breaking point where the wires meet the plug is to cut a 3 to 4 inch piece of rubber heater hose, slice it open diagonally and place the harness inside of it, butt it up against the plug and then wrap the s#&t out of it with black electrical tape, not only does it keep the wires from breaking it also acts as sort of a handle, do this to the 3 pin vehicle control harness also, the dealer got you for $175 for that 11 pin light harness, that's nothing compared to what he'll charge for a new control harness.