WOT switch gives only 49.5 duty cycle

[DGraber460 at aol.com]

Yep. Pin 21 to pin 9 (ground) gives continuity when the switch is tripped.
The duty cycle wanders like it should in closed loop, and when the switch is 
tripped, it locks solid on 49.5%, both in the garage, and on the road. 
Strange.

Dennis