I see all of you guys adding fancy bright lights to your trucks and I'm a bit jealous because I would just like to figure out why my stock back up lights don't work. Right now I have no lights in reverse. I've replaced the transmission switch, checked voltage at the taillights, checked everything in the steering column and still nothing. When I shift from neutral to reverse the back up lights will just start to glow, but not stay on. The dealership says it sounds like something in the valve body. Not sure I'm buying that though. I'm out of ideas, can any of you help?