Hi All,
I am converting my 1950 chevy from a generator to an alternator. I have read through many threads and cannot come up with a conclusive answer to how to wire it. I am using a GM 10si 3 wire alternator. I understand how to connect the two DA wires but have questions about the main power cable exiting the alternator.
If I follow the original schematics with generator, it would suggest that the alternator Batt post (10ga) wire should be connected to the — neg side of the ammeter. A 10ga wire from the starter should be connected to the +pos side of the ammeter. and Battery pos to starter.
I also read that the alternator 10ga wire should be connected to the +pos side of the ammeter. In addition to this a 10ga wire from the alternator should be connected to the starter. This acts like a by pass in the case that the alternator is shorted, the path of least resistance would be to the battery and not the ammeter.
I’ve read that it is not safe to run higher amp alternators connected to the old ammeters. I am using all new wires, none of the original wiring is being used. I believe the alternator is a 63amp model.
What is the proper way to wire this alternator. Should I continue to run it to the ammeter? Should I convert the ammeter to a voltmeter? If I change to a voltmeter how do I connect the alternator the the voltmeter?
Thanks,
Skipper
A voltmeter would be a good replacement for the ammeter. That way you won't have to worry about the ammeter. (which will probably be OK to use) The voltmeter instructions will just be: ignition switched hot and a ground. very simple.
A fusible link should be installed in the wire between starter and ammeter.
Are you going to have an idiot light? What is your understanding of alternator terminals 1 and 2 hookup?
