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Headlight relay buzzing

Discussion in 'Truck & Equipment Repair' started by 99transam, Jan 1, 2014.

  1. 99transam

    99transam Junior Member
    from MA
    Messages: 10

    I have a 1997 GMC K2500 with a mm1. It has a belt driven pump so the only electrical part is the headlights. They worked fine last year but now they dont. When I switch the headlight on I hear the headlight relay buzzing. I checked all the wires and replaced the relays but still not working. Any ideas?
  2. dieselss

    dieselss PlowSite Fanatic
    Messages: 11,392

    Ck your gnds. Might be a bad one in there somewhere