Craftsman YTS4500 PTO trouble shooting

[JKQ]

I have a Craftsman YTS4500. when you engage the PTO the fuse broke engine was running ok.How do I verify the PTO is either good or. bad electrically

 

[Bertrrr]

Pull the wires off at the connection , check both to ground - only one should read ground , engage the switch and see if you have 12 volts on the other wire , if test passes , re connect and engage the switch and listen to the PTO , it should click and engage.

 

[ILENGINE]

Disconnect the connector for the electric clutch. Use an Ohm meter to check continuity from each wire to the housing of the clutch. Any continuity and the clutch is shorted. then connect the meter between both wires on the clutch and check the resistance. Should be around 2.3-3.3 Ohms. Anything below that will indicate a short in the winding.

Or if you have a couple extra fuses. Disconnect the clutch and turn on the pto and see if the fuse blows. If it blows then the short is on the tractor side. If it passes the first test reconnect the clutch and engage the clutch If it blows than the clutch is bad.

 

[StarTech]

It would be a lot simpler if all the mower OEMs just install a 7.5amp fuse in the PTO clutch wiring instead depending on a 15/20 amp to blow as a lot of the times the PTO switch and/or ignition switch takes a hit too.