Loss of power to

radio, remote mirror, and interior lights on 99 Dodge disel dually. No evidence of blown fuse anywhere. My helper was probing square plug that goes to mirror behind dr. door panel with tester and sparked (shorted) said he heard a popping sound behind column under dash. I tried everything I know. Any clues? Thanks Skip

Relay maybe

I don't know Bill, I do hear a clicking above column when door is open and I push the button in. Its on our tow rig, guess I'll investigate when it gets its turn in the garage thanks ole buddy I'll let you know later what I found out. Skip