Working on a friend's 2015 5500 that is factory equipped with the towing package. The clearance lights and the running lights suddenly started staying on 24/7 with key off, lights off, etc. Pulling fuse 79 does turn off the clearance lights, but not the trailer running lights. FWIW, I have disconnected the 7-pin harness at the back of the truck, so neither of the 7-pin plugs are part of the circuit. I have removed all of the relays in the fuse box as well as all of the relays in the box that is behind the left side battery, but the lights are still on. I would like to trouble shoot the relay circuit for the clearance lights, but can't find anything to tell me which relay that is. Any and all help would be greatly appreciated. Thanks.
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Clearance lights and trailer running lights stay on all the time
- Thread starter Sewer Rat
- Start date