The 96 12V I recently acquired has an electrical issue. Sometimes the dome lights stay on and will go off on their own and then come back on their own. If the dome lights are on they will blink in time with the turn signal also. The truck has a Trailor brake on it for a 5th wheel & the wiring is a mess and having dual batts everything "ADDED?" seems to be powered off the driver side batt + post....When I was putting front fender flares back on it The darn thing would shock me when I rested my forearm on the fender .....WHERE to start.