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Z930m Electrical Issue- Solenoid/fuse/wire

389 Views 4 Replies 3 Participants Last post by  dave_r
I have a 2016 z930m with the Kawasaki Fx801v engine, 1200 hrs.. A year ago it started cutting out sporadically. The pto would disengage, error code 3-5 would flash, and all power would cut off. No lights, no anything when turning the key. After 10-15 minutes it would turn back on.

Since then, I have found that removing the small fuse that connects to the starter solenoid letting it cool and replacing it will let me get the mower moving, but it will cut off again within minutes. It seems to happen primarily in the heat. It ran fine early spring.

Any known fixes or suggestions?
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Maybe figure out what those error codes are? Might be listed in the operators manual...

Edit:
And it is highly unlikely that the starter solenoid itself is the problem. While it could be a poor connection on (ie, corrosion on the connectors and/or post), the solenoid itself is only used for the brief period when the starter is activated.
Excessive current through PTO switch. Which could explain the pto shutting off. But would that problem cause a complete power failure? And I don't believe the Solenoid itself is the issue, but removing the small block fuse that goes to the solenoid is the only temporary quick fix I've found. Could that fuse reset something? Two different John Deere service centers have been unable to resolve it.
Maybe figure out what those error codes are? Might be listed in the operators manual...

Edit:
And it is highly unlikely that the starter solenoid itself is the problem. While it could be a poor connection on (ie, corrosion on the connectors and/or post), the solenoid itself is only used for the brief period when the starter is activated.
That's not something I would think JD would have a computer track...but if that's what the error code means, then I would start with:
-examining the wiring harness for the pto circuit for any spots where the insulation has been worn through
-put a inline ammeter in the pto circuit, where you can what how it changes over time.

Perhaps there's some heat-related issue with the pto clutch, so when it gets hot it uses more current. And maybe it gets to the point where it drops the overall voltage too low, but it's not enough to blow the fuse (depending on where the fuse is, maybe it can draw too much from the engine charging circuit, which may not go through that fuse...
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