Newbie here... Recently picked up an '03 C4S, full of gizmos. The driver's lumbar control does not work. Previous owner experienced problem, took it to dealer and all was miraculously well when moved to the wife's seating position. "Must be some sort of short that fixed itself...", dealer speak for we can't fix it I think. Anyway, the switch indicates operation at all four positions; compressor in seat back operates with 12 volts across the contacts. No apparent voltage to the switch from the box under the seat. Anyone experience similar problem, or suggested fix?
Thanks much,