If you remove the cover for the autoshifter, there is a switch bolted to
the passenger (right) side of the shift selector lever. It's possible that
the contacts for that switch are simply bunged up and a good cleaning is in
order.

Sean B.
'90 V'gon, "Happy Bus", pseudo Wolfy
Torrance, CA
Join the TiiCo registry at
HTTP://www.vgonman.com