My '03 Express has a high beam switch with a mind of it's own. At night, my high beams will go and off on randomly, although it seems to mostly be related go going over bumps, but not always. Clicking the beams off with the signal stalk will work, but it won't stop it from happening again.

Bad switch? Wiring??

Any ideas are appreciated.

 

C'mon folks...
87 bazillion Express vans on the road and no one else has this problem??