Re: Hooking up a Motorola Alternator

Posted by RodinNS on November 15, 2005 at 17:46:39 from (142.177.93.45):

In Reply to: Re: Hooking up a Motorola Alternator posted by JackT on November 15, 2005 at 13:17:08:

Hi Jack,

I should have looked at the wiring diagrams first. I think you're right about that stator terminal. It will probably just sit unused. Now, as these Motorola's were used on Ford tractors, the alt was not internally regulated. The alt had a field terminal, as well as an output, Reg, and ground terminal. In this setup, there was a wire from the reg to the field, from the reg to the alternator ground terminal, and another wire from the reg, in parallel with a wire from the key through the charge indicator light, that went to the alternator Reg terminal. So, at a guess, I would say that you need to wire an idiot light into that circuit. Basically, run a wire from the key to the regulator, and then "T" the indicator light into this wire, with the other end of the indicator light wire going to the "REG" terminal on the alternator. Again, this is simply how the tractors were wired, and I'm describing the wiring diagram as best I can. Your situation may be different, but I would suspect that there would need to be some form of indicator light, and that this would provide the initial "excitement" through this wire. Otherwise, I would expect that this alt may have some problems..... In that case I would just go to the local auto parts store and get a reman Delco 10si. They're available in a range up to about 100 amps, and easy to wire. Anyhow, good luck, and if you need more info shout back.

Rod

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