There is a safety switch located on the brake pedal which ensures that the brake is applied before the car can be taken out of park. Check the operation of this switch,replace if ness.
truck lights and plow lights are on at same time. I switched harness and same problem. I replaced...
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truck lights and plow lights are on at same time. I switched harness and same problem. I replaced relays and now truck lights don't have high beams and lights on trailer has no break lights. I think the 2 relays are wrong and or wired up wrong?