Ok, at this point I installed a new PTO switch and with the switch on start position I'm reading 11.92 volts at the harness plug, purple wire for the seat switch. With the switch in on position, I'm reading 0 volts. I checked continuity on the black wire comming back from the harness plug for the seat switch and it shows good continuity. Why would I not see 12 volts on that purple wire with the switch in on position?
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