Does any know if the fan-speed contol switches for the rear blower and the front blower are interchangeable?  In a effort to isolate the problem I have with the rear fan - only runs on high speed - I want to swap the switches.  If, after the swap, the rear fan works on all speeds, then I know it's the switch rather than the motor.  Just trying to plan ahead...

Alan Bosch
& Phred ('88 Wolfsburg)