In a message dated 96-10-23 16:08:19 EDT, ljohnson@halhinet.on.ca (Lawrence
Johnson) writes:

<< The heated mirrors on my 1986/2 westy syncro don't appear to heat. I
 don't know which circuit they belong to. I can't find any reference to
 them in the Bentley manual. 
 Can anyone give me guidance?
 Larry >>

They are engaged by the rear window defroster circuit.  Turn on the reart
defroster, wait a few minutes and fell the mirrors for warmth.

Good luck,
Jim Davis