Short of using a paper clip to complete the circuit, is there a better way to determine which switch is defective on a machine with multiple switches. I have a 44" Toro Z. When the handles are pushed out and the parking brake applied, the motor dies. Also it will not start with the brake applied and handles extended. Jumping the wires at the stater solenoid will start the engine so that eliminates the seat switch and everything works just fine. Just seems like a primitive way to isolate theproblem.