I have a 04 Scab that I recently did the push button starter mod to and now my reverse sensors aren't working. I'm not sure if it really is related or just a coincidence. I searched about the sensors and read many threads but I'm not getting the same indications that many others had. My parking sensor switch works fine, it does not automatically go to "Off" when I turn the car on or shift into reverse. It turns "Off" and "On" like it normally does but I don't get any beeping. I checked the sensors and read that I should hear a clicking from them when they are on but I don't. I read in one thread that the computer for the back up sensors gets power feed from one ignition wire, possibly one of the ones I tied into for the push button (Red w/ blue stripe)? Anyone know how to actually electrically test the sensors with a multimeter or know where I can find some wiring diagrams to see if the system is in fact tied to the ignition wire harness?

 

Got it, fuse #10 was blown. It was for the trailer reverse light circuit though, weird.

 

glad you found it, and thank you for posting back your solution for the next member.

It is weird that Fuse #10 was the issue, this is the fuse that feeds the normally open contacts on the Trailer tow reversing lamp relay, but the PAM should be from the same circuit that feeds the coil on that relay ( via fuse #14 ).
- This is what the 2006 EVTM shows, could be a typo in the diagram. Something I will try to keep in mind for the future.

Thanks again for the info