Thanks Dom. THey are pretty simple but still don't seem to work. On one of the ones, the circuit board had a burnt trace in it. The other round one clean up nicely but it still does not want to perform. All the pieces are there and look like they should work but.......Greg, I have never opened an S4 mirror switch (I have though opened and cleaned the round S3 type and posted photos somewhere here on BB in a pdf)
but I do know that you can (well, over here at least) buy an alfa 155 switch (probably never got those in the States?) which is very cheap........the 155 switch has the same innards, only the 'lozenge' shaped bezel is different....difference being the 155 switch has the left/right arrows on the toggle itself, not on the bezel...........also, some 164 MY shared the same
see my old posting on the S4/SZ/164/155 & yes, ferrari(!) switch info
Wanted - Spider 91-94 Series 4 Mirror Switch
Don't know when I will try the S4 style but one day...
Since I am the only Alfa driver, I just set the mirrors where I want them manually for now.
I have owned an XK8 for many years and did not realize the the electric mirrors stopped working because I never needed to change the position.