While backing out of the church parking lot, I "nudged" into a parked car. The damage to my bumper was minimal...a dent to the far right side that we pushed out ourselves and a smudge. The interior backup lights worked fine for several months but are not working now. I'm quessing the lights don't work because of backing into another car even though it was at very slow speed with very little damage. Can you tell me how this can be fixed?