Wow! Takes me back to the old gearhead days. Reverse lights on while driving was a sure sign of a failed switch associated with the floor shifter.
A quick look at a wiring diagram for your truck shows that the back up light control is part of a neutral safety/backup light combination switch. Either it is failing or you have a short on that circuit to a "HOT" wire.
Good luck and let us know.
Sunday, February 12th, 2006 AT 10:10 AM