seadonkey79
Junior Member
'22 2500 6.7 Cummins. 1st time towing and dash says "trailer not connected." Lights and signals work AND the trailer brakes do work when the service brakes are applied. However, when I manually apply the trailer brakes by squeezing the toggle, they don't work - we don't slow down with the truck idling in Drive, though I do feel a "release" when I let go of the manual brake toggle. Anyone else? Problem with the module? All online advice says check grounds and connections. 7-pin connections look clean with plenty of dielectric grease. Thinking of dropping in on the dealer before we leave for a road trip. Thanks in advance.