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Flickering/flashing headlights

Discussion in 'Western Plows Discussion' started by snerdy, Oct 2, 2012.

  1. snerdy

    snerdy Member
    Messages: 32

    I have a 2010 GMC Sierra, 3 plug 29070-1 isolation module western 7' 6" Pro Plow. Last night my headlight, signal lights and dash lights all started flickering and flashing. No plow mounted, just the truck lights. I did an alternator/charging test, all good. I was wondering if it could possibly be the iso port?