Alternator not charging

dru34 said

ok I will try that, BTW when I cranked the car and had it at idle my digital multimeter read as follows black large wire-(10.6 V) blue wire hooked to middle terminal-(9.4 V) green wire hooked to far end (0.7 V). Does that tell yall anything? BTW I have a square back ALT that came with my car(not sure if working) should I hook that one up instead to see if that will make a difference? thanks again.

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You MUST have a voltage regulator somewhere in that circuit or your alternator will not charge. The 10.6 volts on the alternator output wire clearly shows that
the alternator is not charging. (At least you have a volt meter!) The readings on the blue and green wires are about right without a functioning voltage regulator.

Refer back to the post from 11-8 from 67Dart273 and either find your regulator and replace it or install one like he showed in his post. Putting the other alternator in will not help. You NEED to have a functioning voltage regulator before the alternator can charge! (HINT - HINT!!!)

BC