I did some digging this weekend and the sensor pump by the mirror appears to be working just fine. Reading some of the troubleshooting pages in the manual suggests that I may have a vacuum problem. Severl of the posts here talk about a MityVac which JC Whitney shows as being a vacuum tester for about $40. Here's the URL that I found it at.

http://www.jcwhitney.com/webapp/wcs/stores/servlet/ProductDisplay?productId=520&catalogId=10101&langId=-1&storeId=10101

Is there something else that I should have too?

Thanks!

Sean