I have a 03 bonneville, the master window/mirror switch has a small issue. The pass rear window will go down but not up and the lockout button isnt working. The pass rear window operates fine from its own door switch. When I tore the master switch apart it seemed to have some water damage. I assume the master switch will need replaced to fix this problem

It sure sounds as if it needs replacing.especially if you say its water damaged..Water+electial parts=No good lol