I have an issue with my bike not charging and i cannot work out what the issue is. I originally took it to a shop as it stopped charging while riding it to work and wouldnt start when i got to work. I have a battery voltage monitor as oart of my TPMS and saw it at around 10.5 Vdc when i pulled up. They picked it up, tested it, and reported back that it had 25 vac between the alternator windings at idle and 60/70 ish when revving so probably not that, they reckoned the reg/rec was the issue. It wasnt my local shop and i just wanted to get home so we stuck the battery on charge and it got me home. I'm home now, got a new battery and reg/rec, fitted them and got the same result. Ive checked the alternator wiring myself now and i get 25 vac between al windings, 10vac to ground on each winding, 0.2-0.3 ohms between each winding (all ok so far) but weirdly im getting around 10Mohms to ground on each winding instead of a true open circuit. All windings are the same, and the cabling is all free and not trapped or anything as im testing the plug off to the side of the bike. My meter isnt the best and can only be set to auto adjust for range, but it is definitely showing a circuit of some kind as the screen shows "0L" when its a true open circuit, some dots that flicker when its connected on one side, and definitely shows between 9.7 Mohms and 10.2 Mohms on each one. Is this enough to determine that the stator is bad and i need a new one? Ive already forked out for a new part that didnt fix the issue, i dont really want to do it again. N.B. im pretty sure i dont have a parasitic draw as after starting and revving, the voltage never increases, it just very slowly continues to drop from around 11.5 vdc after starting the bike. Plus when i first put the battery on and turned the ignition on, the battery voltage was a steady 12.6 vdc. I do have a few accessories so its not totally out of the question that one has failed in a weird way. TLDR Is 10 M ohms to ground instead of a true open circuit on each winding of the stator enough to determine that its gone bad?
@Uncool Jim Welcome to the family. Sure sounds like the alternator is playing up. Hopefully one of the wise ones will throw you some light soon and you will be up and running again.
