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And yup. Ground wire is cut off at the loom by the 12v block.. voltage I was seeing was thru the alt. Guess I'm going to buy some fusible links

Had a suspicion last night and sure enough found something else this morning. The 'ground' wire is getting 24 volt not 12. Guess I focused to much on the excite wire and not exactly what voltage the other connections had. I'll have to trace the wire and see where it is connected. The glow...

thanks for the help tow4. all the checks i ran seem to indicate the alternator still has a problem. i think it is the rotor as one of the slip rings seems to be shorting to the shaft. the resistance is really high at about 25-30 megaohms, but still a short. I ordered up a rebuilt 27si 100 amp...

very insightful. except not all alternators have one.

Mine did not have the resistor, but otherwise appears to be a standard unit. It has been rebuilt before so it is possible it had been removed for some reason. the kit i got didnt have new one, but i can order one if needed. I have seen your rebuild thread, thanks it was helpful. I am aware of...

I just rebuilt the passenger alternator in my M1008 and it is still not charging. it gets excite voltage and has power at the the other connections (even though the gen 2 light doesn't come on). When re-reading the TMs and stickies i noticed my alt didn't have a resistor that others do. See...