Electromagnetic clutch

There are four wires connected to the terminal on the front PTO electromagnetic clutch coil. (part number 5189833).
Functional description
Pin 1 - White wire =Carries ground from control unit (ECM) Pin CN6
Pin 2 - White wire with red stripe =Carries 5 volts from ECM Pin CN4
Pins 1 and 2 are connected to the slip detection coil. There is approximately 15 ohms of resistance between these two wires. If more or less resistance is recorded, replace the clutch assembly.
Pin 3 - Light blue wire =Feeds measurement voltage from coil back to ECM pin CN25.
Pin 4 - Light blue wire with black stripe =Feeds 12 volts to clutch coil from ECM pin CN17. Two seconds after the front PTO is engaged, 12 volts are present on this wire.
Pins 3 and 4 are connected to the clutch engagement coil. There is approximately 3 ohms of resistance between these two wires. If more or less resistance is recorded, replace the clutch.
Caution:
The front PTO electromagnetic clutch coil must receive 12 volts from the light blue wire with black stripe. Connecting a voltmeter between the light blue wire with black stripe and frame ground should indicate at least 12-volts.