i have an 04 Excursion, Limites, 4x4, 6.0PSD. My trailer lights are not working. I have checked every fuse under the dash, I have taken out the relays under the hood, tapped them, cleaned them and still nothing. There are no blown fuses anywhere, the electric brake controller still has power, the plug is not getting any power on any circuit. Any suggestions?

 

No power at the 7 pin plug? How about the 4 pin ? Are you checking at the plug with a voltmeter or thru the trailer connector?

 

Finally discovered the issue. It was in the body shop back in May, they had to remove the bumper as part of the repair and truck failed to reconnect the trailer pigtail to the main harness. Once I discovered that it was easy.

Thanks