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John Deere x300 series 2009 model I unhooked the kill wire and it started. But now my mower/pto will not engage is there a way to bypass the sensor?


Based on the combination problems involving the coil kill wire and the PTO activation, I would suspect the PTO switch is bad.

I do not have a schematic for the 300x, however I most of the functions are comparable to the LA 145, 165, 175.

The PTO switch is a multifunction switch. It will have 3 to 4 different functions internally. On the LA 175 it serves 3 functions. These 3 internal functions are independent of one another. Electronically they are known as single pole/single throw switches. In other words even though they are all housed inside a single unit they act light 3 separate light switches in your house.

One function ("light switch") controls your cranking system. When the key is turned to Start, power flows from the Key switch (purple wire) to the PTO switch. With the PTO switch off it flow out (purple/white) and goes to the Brake switch. If the Brake is set the power flows through to the starter solenoid and your engine cranks.

Another "light switch" inside the PTO switch controls the Blade Clutch. Power flows from the Key switch, in run position, (yellow wire) to the PTO switch. With the PTO switch on it flows out another yellow wire to the Blade Clutch. A DC volt meter should show 12 volts switching on and off as the PTO is turned on and off.

The third "light switch" completes a Ground Path. This ground path is a totally separate pathway running through the PTO switch. The ground system is fairly complex because it operates differently under different scenarios.

To produce a spark, the key switch must be in the start or run position. While starting the PTO must be off and the brake set. The seat switch does not matter at this point.

Once the engine is running the seat switch plays a part if the PTO is activated or the Brake is released. Someone must be in the seat.
The Kill system is activated
  1. When the key switch is turned off.
  2. When the operator leaves the seat without setting the brake and turning off the PTO.
  3. When the machine is reversed while the PTO is engaged and the back up switch (RIS) is not pressed.

So there are three different paths to ground; any of which can kill the engine by grounding the coil. Except for turning off the key, all other grounding functions flow through the "grounding light switch" in the PTO.

Because you have a combination problem, the Coil kill wire is grounding the engine and the Blade Clutch won't activate the blades; both of which are affected by the PTO switch, odds are you have a bad PTO.

Obviously there are too many complex functions to just bypass the switch. You will have to replace it. The part number you need is AM135131. You can do a site search to locate and order this replacement switch for about $26.00 including shipping at this site: GreenPartStore Parts for John Deere Lawn Tractors John Deere Lawn Garden...

Mar 29, 2015 | John Deere Garden

1 Answer

How do you know if it is the switch or the clutch when the blades are not engaging?


if no voltage at pto then go to switch if no voltage there check fuse if power there replace switch if voltage at at pto replace clutch switch cost 60.00 pto 200.00

Sep 01, 2014 | Garden

1 Answer

Why will my zd21 kubota zero turn mower pto clutch not engage


First check fuse. Then with a volt meter check for voltage on the 2 wires going to the PTO clutch with the key and pto switches on but motor off ( you may need to trigger the seat switch as well). IF voltage is detected the clutch its self is suspect. If no voltage then check for power into the PTO switch and then out of. If power in but not out then the PTO switch is suspect. And keep chasing voltage down the line until you find the failure. Voltage travels from key switch thru fuse, PTO, seat, and reverse switches to the clutch

Sep 01, 2014 | Garden

1 Answer

The pto will not engage when switch to turned on


The light just indicates power is available for the PTO clutch. It doesn't it reaching the clutch. You need to unplug the PTO clutch and check to see if voltage is there. If it is there then clutch itself is bad or the wiring from the connector to clutch is broken. If no power at the connector then you have wiring problem and may even have part of the PTO switch not working.

Jul 31, 2014 | Garden

1 Answer

Why wont john deere stx 30 pto wont engage


Most of these mowers have a safety switch between the PTO switch and clutch. A safety switch or relay is most likely the problem. Hope this will help ya.

Jul 19, 2014 | John Deere Pto Clutch For Stx38 And Stx46...

1 Answer

I have no power to the pto on my LT1042 mower I found broken wires and fixed the but still no power. Where are the fuses that would blow? I only found one fuse and its ok


Did you check for power at the pto switch? Start with checking that, then check the wire from the PTO switch to see if it has power all the way to the PTO clutch. If there is power to the clutch, and the belt is good and routed properly it's probably the PTO clutch.

Aug 11, 2012 | Cub Cadet Op's Manual Model Lt1042 Lt1045...

1 Answer

NO power to pto craftsman gt 5000


could be a clutch switch look at sears parts online for the location

Apr 01, 2012 | Garden

1 Answer

Pto, electric clutch


check the wires they rub on sharp edges

Mar 23, 2012 | Husqvarna Garden

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