This got me one step closer, but it only worked with the RH mirror. When I swapped those same two wires on the LH side, all the functions on that mirror were reversed again. The RH mirror is now functioning 100% correctly though!
So I restored the LH mirror C and D wires back to their original positions, and tested again to ensure it still worked as before. Yep, all good, left and right movements restored, and still the up and down functions reversed. So I then swapped terminals A with B and tested once more.
SUCCESS!!!
Both mirrors, and all functions now operating correctly in all the proper directions! Immense thanks and gratitude to ELCAM pagrunt 88AZSS and UC645 for all your help, suggestions and advice. I cannot thank you guys enough for helping me get this figured out.
This is the final configuration of the mirror terminals in each mirror plug, their corresponding wire color in the harness, and the switch terminals, colors, functions, and its corresponding wire colors to the harness:
Posting this not just for resolution, posterity and a written record, but also to help ANYONE that might come up against this with their own projects. Camaro, Monte SS, Corvette, Fiero, Firebird or otherwise.
Issue officially resolved. Thanks guys.
