Also check your plug and look at the brass pieces inside there that make contact with the trucks female end. I noticed mine were a little flattened, so I did what Im describing below.
The pins insdie the the plugshould be split on the ends. What you do is take a small screwdriver and put the end in between the split end of the pins to open them up a little so they contact real good with the femal plug end. Other types could need to be just spread open a bit to accomplish the same thing to make good contact.
I used to have to do this on my plug when I drove a semi for a living.Edited by: fixit5561
Brian, Tamara, Abigail
2003 Lincoln Navigator Ultimate Edition 4X4
2004 Crossroads Cruiser CT30RL