MY PTO WOULD NOT ENGAGE. I TESTED THE WIRE AT THE PLUG GOING INTO THE CLUTCH, READS 13.6V. THE CLUTCH SWITCH OPENS AND CLOSES, SENDING 13.6V TO CLUTCH. I REPLACED THE CLUTCH. IT STILL WOULD NOT ENGAGE. I PUT JUMP WIRES DIRECTLY TO CLUTCH FROM ANOTHER SOURCE AND IT ENGAGES. I UNPLUGGED AND TESTED...