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post #1 of 5 (permalink) Old 06-10-2019, 02:34 AM Thread Starter
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Need help troubleshooting Sportsman 570


I have a 2015 Sportsman 570 which goes through a lot of mud (and sometimes doesn't make it through).

The battery went dead, I replaced it, happened again.

Fast forward and this is what I discovered:

With the key off, there is a 50 amp draw on the battery.

Disconnecting the voltage regulator from the stator (the 3 yellow wire connector) stop the draw.

I checked the yellow wiring from the VR to the stator and the plastic sheathing was filled with wet mud and the place where it routes between the oil filter and the engine was jammed with mud. I rerouted the wire and it still draws ~50 amps with key off.

That's as far as my understanding can get me.

Is the problem the VR, the stator, or something else?

Thank you!


Last edited by josephny; 06-10-2019 at 03:51 AM.
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post #2 of 5 (permalink) Old 06-10-2019, 04:57 AM
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LOL, Well I'm no electrician but I doubt you have a 50 amp draw. You could just about weld cracks in the frame with 50 amps and there would be no yellow wires to even check since they'd be melted away. You may have 50 milliamps of draw. Sounds to me like you probably have the same issue as many other 570 owners. Your VR is toast.
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post #3 of 5 (permalink) Old 06-10-2019, 06:13 AM
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When the diodes in the rectifier short out, the battery may discharge through the voltage regulator to ground usually at a less than 1 amp rate. As polman states, probably 50 milliamps. A 50 ma draw on a battery will completely discharge it in less than 48 hours.

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post #4 of 5 (permalink) Old 06-10-2019, 11:48 AM Thread Starter
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Thanks very much for the help guys!

I certainly could be wrong (more often than not, I am). I used a clamp on DC amprobe and it indicated 50 amps (not ma). I did that because the wires and the VR were getting very hot after a couple of seconds.

I checked the stator output and am getting about 22VAC across any two of the 3 legs at idle. Does that sound about right?

I ordered a new VR and hopefully that, and having rerouted the wires between the stator and VR and gotten rid of the plastic sheathing that filled with muddy will do the trick.

Any other suggestion would be appreciated.

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post #5 of 5 (permalink) Old 07-07-2019, 09:34 AM Thread Starter
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To share the outcome: I replaced the VR and all is well.

I suspect the fact that the black plastic wire sheathing around the wires that come out of the VR was packed tight with moist mud, or just repeatedly getting the VR soaking wet, caused the problem.

Thanks again everyone!
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