Truck Running Lights For Trailer Wont WorkTruck Running Lights For Trailer Wont Work August 25, 2021August 25, 2021| fkdtsoreangfkdtsoreang| 0 Comment | 2:09 am A loose ground wire will keep the lights from working. I know the wire plug on. pick+ups+with+chicken+lights clearance lights truck The truck's running lights will work, but the trailer won't View MoreView More