On my stinky expensive 90 I'm rebuilding I have come across an irritating feature, thought I'd ask you chaps if you had any experience with it.
I have no slow speed fan, the heater fan switch seems to be ok (it's an early 90 so fairly basic) Have swapped the wires over (just in case I put them on wrong), cleaned the terminals on the switch, checked the conections etc etc, could it be motor, or the wiring inside the big black fan box??
Any pointers greatly appreciated?