check for broken/frayed/loose wires in the brack rubber boot in between the divers door and the car. The only other thing that comes to mind is the mutifunction switch (for that you can do a search on here and find the fix posted by thumpin455 or look here
http://home.achilles.net/~howardm/aurora/aurora.php
)(I believe its the 3rd link on the "under the hood" page)
i think a member by the name of anusemoon (sp?) had the same problem, so you might double check with him on it.