2006 Chrysler 300 Trunk release and interior lights

I disconnected the negative cable on the battery in the trunk to see if that would reset the check engine light. When I reconnected the cable the interior courtesy lights and the trunk release in the car and on the key fob stopped working. It doesn't appear that any fuse is the culprit. The dealer can't find the problem without "getting into the wiring" and charging me an arm and a leg. I will increase my donation if the right answer fixes the problem. I paid for an answer on another website and the answer was to check a fuse which I had already done so the answer was useless.
Doug