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Unimount on 05 2500HD wiring ?

Discussion in 'Western Plows Discussion' started by djagusch, Dec 2, 2010.

  1. djagusch

    djagusch 2000 Club Member
    from mn
    Messages: 2,107

    I purchased a 8ft Unimount w/9pin lights with a mount (3525). It came off an 2002 Chev. Didn't get the truck side wiring.

    Putting it on a 2005 Chev 2500HD

    What I got from the western site is that I need Wiring harness 64077 for the truck side and different headlights white 12pin (64078).

    I got a lead on a used 64077 harness but owner states that is was for only 2003/ early 2004 models and then for 2005 it goes back to the 9 pin lights. Any truth to that? I don't believe it but might as well ask.

    RIght now I'm going to wiring the headlights to a toogle switch and tap the park/turn lamps for the time being.

    Is there any other wiring option besides the 12pin (with Part Numbers please) as I think the 12 pin is not very common and limits finding used parts? Ultra mount wiring?

    Thanks for the info.
  2. SnowMatt13

    SnowMatt13 PlowSite.com Addict
    Messages: 1,559

    No you need the 12 (or was it 11???)
    Sorry, too cold to go out and look at my truck.
    It's for the headlights.
    The last unimount I rehabbed had a 9 pin.
    Still plugged into mine and all functions worked fine, the difference was low beam only for headlights, no high.
  3. areelice

    areelice Junior Member
    Messages: 2

    I have an 02 that I have the 12 pin and need the 9 pin. I think anyway. Plow came off like an 05 and wiring isnt working for me. want to trade?
  4. Nasty-Z

    Nasty-Z Senior Member
    Messages: 370

    You need to use the 12 pin 64077/64078 relay system kit's for it to function properly. There is really no easy way around that one.

    Or you could step up to the 3 or 4 port ISO module system , but the cost will probably outweigh just staying with the relay system.

    Sorry for the bad news