No idea.
The only thing I do to Walkers is to replace Triad engines.
However Walker have an excellent after sales service being that there are several Mr & Ms Walker s working there.
Send them you model details ( don't tell them you have disabled the seat switch ) thet are generally very forthcomming with service information.
There should be
one on each of the motion levers,
one on the parking break
one on the PTO
One on the seat
And I think
one inside the catcher
one on the deck service flip.