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Turn on High beams, the plow shuts off ?

Discussion in 'Western Plows Discussion' started by doh, Dec 18, 2009.

  1. doh

    doh Senior Member
    Messages: 253

    We just installed a Ultra Pro Plus on a 550, 3 port Iso Module. The plow works great, until you turn on the High Beams, then the control dies. Switch back to low beams the control can be truned back on.

    Any thoughts?
  2. Western1

    Western1 Senior Member
    from MI.
    Messages: 752

    Sounds like a bad B harness? Do you have another one from another truck to check it? It is the same harness on a four port only the #2 harness.
  3. no lead

    no lead PlowSite.com Addict
    Messages: 1,308

    were did you tap switched power for the plow?
  4. doh

    doh Senior Member
    Messages: 253


    I first though it was because the tech started with a 29051 harness, when the truck needed an 29049 harness. (2b verses H13 light system) He changed 1 of the 3 harness's and the plow did this.

    But it was where he tapped the power from. New electrical systems are so Complex.