I lost all function of the multifunction switch(turn signals, wipers, hazards) and my fuel gauge doesn't work, and the headlights now come on automatically without use of switch, I can't dim interior lights nor can I turn headlights off. I read several threads and assumes it was the multifunction switch. I purchased one and before fully installing it I plugged the harness into the new switch and still NOTHING. WHAT could the problem be??