What would cause back up lights to stop working along with trunk and gas door buttons on key fob and in dash buttons to quit working?

Answer 1

I'd suspect a fuse has blown, but I doubt that these are all on the same circuit. Perhaps a couple fuses, or could be low battery voltage if you have an old battery. The key fob only sends a signal to a receiver in the car to operate the door locks and trunk lid solenoids, so the same loss of power to these circuits will halt the key fob operation, probably nothing wrong with your key fob. My 99 Intrigue does not have a gas door button on the key fob. It's possible that those circuits are all one fuse. Or, there is a pinched or broken wire in the harness going to the trunk or another door. Once, I had an intermittent non-working passenger power window. It turned out to be a cut wire in the bundle of my driver door. Someone forgot the wire-protecting grommet on the hole in the door for the wire bundle, and that particular wire got cut simply by the action of opening and closing the driver door. This wire was from the master control switch in the driver door. After many hours of troubleshooting, I found the problem by accidentally rolling up the wrong window while my driver door was opening! Talk about a stroke of luck!....Hope this helps...BB