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Old 10-31-2012, 07:24 PM   #3
mfp4073 OP
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Joined: Jul 2010
Location: Central Florida
Oddometer: 2,169
Quote:
Originally Posted by Wirespokes View Post
The 74 is wired different than the ones that followed. You've got two wires at that terminal, all the rest have only one. That's why those instruction don't make sense.

The fact of the matter is your alternator isn't charging. And the first suspect is normally the rotor. In this case the brushes are obviously making contact and there is a flow through the rotor to ground. Normally the rotors fail open, but they can short circuit as well, and that's what I suspect in your case.

What you need to do is measure the resistance between the slip rings with a good ohm meter. insulate the brushes from the slip rings with something nonconductive, like a bit of cardboard. The rotor should measure 3 ohms - something in that range. If it's zero, that's the culprit!
First to respond always and with the right info out of the box. Let me see what if I can follow your directions and figure it out.
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Originally Posted by bgoodsoil View Post
Cavemen must've designed them shortly after inventing the wheel.
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