The pass. rear door lock no longer electrically operates at all, and no int. lights come on when that door is opened. It was working fine, and the next minute not working at all. Any ideas?

 

im assuming that its your 4.0 thats doing this,if so its the latch.its all intergrated into the latch thats whay your int. lights dont function with this door. if you dont replace the latch you may also have alarm issues in the future.

 

I'll second Rovertech's advise