Static test of Denso 12 V alternator

[Guineafowl]

Yup, intermittent coil-to-coil short. Hope you can find a motor rewind or alternator repair shop nearby. It's possible to do it yourself but kinda touchy, and often hard to get the right size wire and insulating paper if used.

Please keep us updated.

Sadly, the little old rewind shops are getting rare these days. Since I assume a bad stator is a less common fault than, say, a bad rectifier or regulator, I may be able to find another similar unit and make two into one.

Anyway, I can bide my time now as the old dynamo is back on line!

I'll certainly post an update - very frustrating to view a thread that is not resolved.

 

[jim hardy]

It doesn't read shorted with the multimeter now, but if I squeeze the coils gently the reading will jump around a lot.

Sometimes, if you're lucky,...
you can poke the winding with a soft wood stick (ladies' orange stick for cuticle maintenance work well) and get the wires separated .
Then saturate the winding with varnish.
Proper material would be electrical varnish or industrial "Glyptol" electric motor paint made for the purpose.
I have had success with both Polyurethane wood furniture varnish from the hardware store and high temperature engine enamel from the auto parts store. For under the hood i think i'd prefer the engine enamel.