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I am measuring between the threaded stud on alternator that has large gauge wire attached and to near by strut mount point bolt (chassis). Sounds as if this stud is the B+ terminal you refer to. The only other connection is a multi pinned round press in connector with 2 or 3 wires in it.
I have measured this same point (stud) in the past when everything appeared to be working ok (battery charging by alternator) and have read 14V on that terminal. Last night before I put the charger on the battery that B+ terminal of alternator was measuring 24V.
I am afraid the huge amount of resistance in charging circuit is what I am seeing.
I don't know what to look for here though. Would a failed voltage regulator cause this condition? If it is internally regulated in the alternator this wouldn't make sense though.
How about this scenario. What if some one sold me an internally regulated alternator but mine is external? I could be this naive/stupid not to know how to tell the difference. Trust me.
If it does go through my starter first I guess I check starter connections? My starter works really well but this could be coincidental.
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