Ok so I have been having problems with my reverse sensing system in my Excursion. So I thought I figured out the problem. Basically the system was defaultingly turning off when I put the truck into reverse. It worked intermittently and usually it worked better when it rained. Ok so here is how I figured (or thought I figured) out the problem. When I put the truck into reverse I went to the back and checked all the sensors each one made this faint tapping sound and I could actually feel it in my finger tip if I touched them lightly. However, the one on the far passenger side wasn't doing anything, so I figured it was bad. Oh in the past about 2-3 years ago I backed into a tree on the passenger side but I straightened the bumper out and the sensors worked fine since then. So I replaced the sensor from ford and the damn thing is still not working. I called the dealer and (I knew this already) they told me about the control unit for the reverse sensing system. They couldn't tell me where it was located. I can't find it. What the hell could be the problem? Anyone PLEASE!