Im not having any luck over at the Cummins forum so maybe you boys could help a feller out:I bought the plug and play harness from Hopkins and reese pilot for light towing my car hauler. Presto- no worky, now brake light on, abs light on, no speedometer. All the fuses are good. All of the lights on trailer and truck worked prior to the install. I tried the spare fuse slot fix no luck, Ho do you reset it?Where do I start? thanks 03 ram 2500.