QuestionI have a john deere 145 lawn tractor model 050915YG25120. Here is another number 4417770116E1 and bG2034. My lights work but my blades will not engage. Don't know if it is the ground wire. The 20 amp fuse looks good. What should I do first. Thanks
Answerbrad
You may have a bad PTO or a bad PTO switch. What you need to do is check the switch first,with the mower key in the on position,not running sit on the mower and just like you would do to start the mower pull the PTO switch and listen for a click coming from the electric clutch that engages the blade belt,you should here a click if not then disconnect the connector that goes to the PTO clutch and check for 12 volts from the connector that goes to the clutch. You will need to pull the PTO switch and see if you get 12 volts if you do then you will need to check the ohms on the clutch.Checking the clutch involves The PTO clutch on a John Deere lawn mower is responsible for engaging the mower blades. The clutch bolts to the bottom of the engine crankshaft and uses a 12-volt current to run the system. When the engine is running, and the PTO switch on the dashboard is pulled up to the ON position, a 12-volt current is sent to the clutch, engaging a brake causing the blades to turn. When the Clutch malfunctions, the blades will no longer turn. This procedure will take 15 minutes to complete.
Park the lawn mower on a hard level surface. Remove the key from the ignition and set the parking brake.
Push the mower deck lever all the way forward to the lowest position. Locate the bar that connects the front of the mower deck to the front of the tractor frame. Pull the spring pin out of the bar at the front of the tractor frame. Pull the bar out of the hole. Slide the mower belt off the electric PTO clutch by hand.
Place the jack under the front of the frame and raise the tractor off the ground. Place the jack stands under each side of the frame in front of the wheels. Lower the jack until the frame is resting on the jack stands.
Disconnect the connector plugged into the right side of the PTO clutch to expose the terminals. Turn on the volt-meter and set it to 1x ohms scale. Put the positive lead and negative lead into terminals into the PTO clutch. The reading on the voltmeter should be 3.7 ohms. If it is not within this specification, the PTO clutch needs replacing.
Measure the resistance from each of the terminals with the positive lead from the voltmeter. Place the negative lead from the voltmeter to a ground (bare metal). The resistance should read the same 3.7 ohms. If the readings differ, there is a short in the wiring harness.
