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Wire Harness Guru needed

Discussion in 'Fisher Engineering Discussion' started by FordFisherman, Feb 11, 2011.

  1. FordFisherman

    FordFisherman PlowSite.com Addict
    from 06611
    Messages: 1,613

    Gathering parts to switch my 2 plug MM1 over to 3 plug. Picked up a 3 port iso mod 29070. Will light harnesses from a 4 port system work with the 3 port iso?
  2. chevyzrule810

    chevyzrule810 PlowSite.com Addict
    Messages: 1,288

    why don't you get a 26359-11 pin harness.Its got a green,blue,white,black with a brown strip wires.All you do is open the cover up behind the pump and take the harness that's on the solenoids and match the colors up with the new ones.Then get a 28212 11 pin light harness.You are going to have to take the wires out of your lights and splice the new ones on.This is all plowside and no truck work.
  3. mrv8outboard

    mrv8outboard Senior Member
    Messages: 205

    I think the light harness is the difference between the 3 and 4 port ISO. Meaning the light harness has two plugs (left and right) on the four port. The three port has one plug light harness.
  4. buddymanzpop

    buddymanzpop Senior Member
    Messages: 603

    light harness

    No 4 port light harnesses will not go with a 3 port iso-mod, the vehicle control harness and the 11 pin light harness are interchangeable with the modules.