Here's a link to where the valve is located (this is on a 97, not sure if the 2000 is in the same spot):
http://groups.msn.com/LewisPictures/...oto&PhotoID=29
Check the harness for damage etc. To test remove the valve, when applying 12V to the two connectors the air passage should be open, no 12V and the air passage is closed.