Toro Z Master, an 04. It started cutting off while mowing, got it back on the trailer and checked the safety switches, thought it was the seat safety switch.Starts and runs fine but when you release the parking brake lever it shuts off. Swapped out the seat switch, still cuts off, swapped out the parking lever safety switch and still shuts down when you release the lever. Put a new pto switch in and still no luck. With parking brake on, pull in either steering lever and motor shuts down as it should.Checked and cleaned all the connectors . Not too sure what else I can do, at least it's on the trailer . I'm leaning toward a problem somewhere in the seat safety switch wires. ... Any thoughts ????