2001 Kenworth T2000. Cruise inop. Jakes okay.

Truck is parked and in PTO mode, high idle:

1. When clutch is depressed the idle does not go down - is this normal?

I bypassed clutch switch - no change.

I compared ohms with a new switch and have same reading.

1A. What should the input voltage be, with key on?

2. When service brake is depressed idle does not go down - is this normal?

I bypassed the service brake switch - no change

3. When parking brake is released idle does not go down - is this normal?

I bypassed the parking brake switch - no change.

When I remove either of the 2 connection leads idle will drop.

Thank you.

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