I am in the middle of restoring my wife's 2008 sportsman 400.. Needed a TON of stuff done to it. All is sorted out, except for battery voltage going above 17 volts when revved up. Last fall, the regulator had failed, and in turn burned up the stator and shorted to ground. Stator, regulator, battery, key switch, and starter was replaced last week (starter also burned up last fall). The replacement regulator is genuine polaris, bought new. The stator is also polaris, bought used. It ohms out perfectly, and AC voltage is should be. On the regulator, there is 3 yellow wires to the stator, 1 red to battery, 1 black to ground, And a small yellow with red stripe that goes to the speedometer. What does this small wire serve as? With the yellow/red wire unplugged and engine off, i am getting 10.9 volts out of it. with it plugged in and key on, the voltage stays the same. Is the speedo/ecu supposed to feed a reference voltage to it? I have seen this before on honda 3-wheelers... with the reference wire unplugged, it overcharges. Would i be able to simply run a keyed 12 volt source to this wire as a reference voltage? Any help would be immensely appreciated, as i would like to finish this project before april 10th!
The wiring diagram gives no info on the purpose of the 6th wire either.