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A while ago, I had a Durametric scan on my 996 (1999), and during the Short Test I received fault codes 22 (Potentiometer right mirror Open circuit vertical) and 20 (Potentiometer right mirror Open circuit horizontal) under the Seat Memory section.
My question is, where are these potentiometers, if I wish to inspect them for either being worn out or having a bad connection? I can manually adjust the passenger mirror with the mirror controls, it's just that the passenger mirror doesn't work with seat memory. I'm taking a guess that the mirrors only have motors in them and these potentiometers are probably in the modules under the seat or in the door sill, but I'm not sure which, and where specifically. Also, are these potentiometers tiny little trim pots on a circuit board, or some kind of larger specialized potentiometer component with a part number? Or does one typically replace a larger module for a fault like this?
The closest thread I could find on the subject was this one: http://www.renntech.org/forums/topic/40724-seat-memory-function-issue/?hl=%2Bmirror+%2Bpotentiometer - but it appears his issue was fixed by plugging something back into a control module that was intentionally unplugged, and did not reference the specific potentiometers.
Any more specifics or even links to circuit/wiring diagrams for this area would be great. Thanks in advance.