Posted for "Bob B." <rbelshe@comcast.net>:

 A quick look at the schematic shows that the gear switch is in series with
 the pressure switch.
 Therefore, both switches would have to fail to cause the pump to run in the
 "up" direction.
 I think we need a new theory here.
 
 Bob Belshe
 Moraga, CA
 Lancair 235/320
 http://home.comcast.net/~rbelshe/