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western unimount lights wont change over

Discussion in 'Truck & Equipment Repair' started by littleman, Dec 13, 2013.

  1. littleman

    littleman Junior Member
    Messages: 5

    04 f350 v10 with a western unimount plow. i can not get the lights to switch from the truck to the plow. the truck lights stay on but the plow lights will not go on high or low or running lights. plow turn signals do work however. i have re placed the 2 relays with brand new ones. i have checked all the ground wires too. but on the relays if you run a wire from 30 to 87 the lights will come on. just depends what lights come on depending witch relay you are jumping(high or low beam relay). at this pont i am completly stumped and dont know what to do. the plow its self works fine too. up down left right. it all worked when i put it in the back of the shop this past season. any help is apprciated. thank you.
     
  2. littleman

    littleman Junior Member
    Messages: 5

    *ultra mount sorry
     
  3. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    2 relay ultramount?
     
  4. littleman

    littleman Junior Member
    Messages: 5

    Yes 2 relays and they are brand new
     
  5. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    Ok, ck for gnd, blk/og with the plow hooked up
     
  6. littleman

    littleman Junior Member
    Messages: 5

    All grounds are good I have found
     
  7. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,983

    At the relay. When you plug the 2 grill connectors it sends a gnd signal to the relays. Energizing them and turning on the plow lights