1983 XS650 Wildly overcharging battery

[zbillz]

Rectifier polarity correct, guessing fuse would blow if not.
Key on, the rotor should magnetize?
Need to try this.
Ohm the rotor, would that be between the 2 brush screws with wires disconnected ?
What is an acceptable reading ?

 

[gggGary]

Ohm the rotor,

directly ring to ring with an ohm meter should be 5.4 to 5.7 ohms after the meter stops dropping.
It's hard to get a lead directly on the inner ring. Remove either a brush or the stator.
I'm using a drywall screw to get into the ring in this pic, A piece of copper (from some house wire?) would be better.

 

[zbillz]

Yes brush green to regulator green had 60 ish ohms, not a dead short.
Have not looked into wiring since.

 

[zbillz]

Should the wire under the circled screw terminal have +12 volts when key is on?
Magnet test failing.

 

[gggGary]

 

[zbillz]

Got it, thanks.
Brown wire at regulator getting switched 12 volts.
Losing the +12 volts for some reason at the brush. Will keep digging.