Stator working, no measurable draw, co Stanton dead batteries
Sorry if this ends up a bit long. Just trying to describe the history of my bike.
2013 Sportsman 500. Only aftermarket electrical accessory is a venom winch was installed immediately after purchasing. The factory battery worked fine from 2013 to 2017. When it quit working last year I attributed it to the batteries age and reached it. I bought an autolight AGM battery it worked okay throughout the summer of 2017 but by spring 2018 it had also given up the ghost. I kept the quad on a battery tender over that winter. After repeated charging it would read 11.5V but would rise to about 14.3V while the quad was running which made me believe the stator was working properly.
Thinking that the Autolight AGM battery was crap I purchased a Yuasa from Summit last spring. It too worked fine over the summer of 2018. This spring I've had the same problems I had with the AGM battery. Is the quad sits more than a day or two without being ran the battery will die.
I put my charger on the battery overnight. Tested the voltage today and it was 12.5V. I then started the quad and the voltage measured 14.3V and held consistant.
Next I pulled the negative terminal off the battery and checked for parasitic current draw. I get nothing measurable on the 200mA setting which is as low as mine goes.
I then pulled the reg/rec from the quad to bench test. I performed a diode test with the following results:
Forward bias, wire 1, 0.389v
Forward bias, wire 2, 0.390v
Forward bias, wire 3, 0.389v
Reverse bias, wire 1, OL
Reverse bias, wire 2, OL
Reverse bias, wire 3, 1.350v for a split second then OL.
The split second reading across the third wire is consistent every time. I've never seen this happen on a diode test. It's the only wire it happens on.
Does this indicate a faulty Regulator?
I'm kind of at wits end. With no parasitic draws obvious I'm not sure where to go next other than replace the red. But considering the 3 forward readings were all consistent it make me wonder.