Is there anyway to test the mirror switch (I assume the round twisty knob you use to adjust the mirrors?) apart from the obvious of taking it out and fitting a new one? If new switch is only way I will take one soon of you, going to need some exhaust gaskets and bolts in the next week or two so might as well get them all at the same time.
Is there a noise from the mirror when you are trying to adjust it?
Nope no noise when trying left/right. Only sound I can hear I what I can only describe as a slight click coming from the door, maybe a rely or something? But the mirror motor is deffinatly not trying to move to the side.
If you are getting a noise from the door area when working the switch then that probably points to a fault perhaps in the mirror.
Without getting to technical on the proper test procedure, why not just swop the mirrors over.
They obviously will not fit to the door, however the electrical connectors are the same.
In fact all you have to do is remove the passenger mirror, disconnect the wiring block connector on the driver's side and connect up the passenger mirror to the driver's side and test.
Alex