need some info,i have had issues with my 10si alt.(only 42amp:doh:) and my taurus fan not keeping the battery charge when the high kicks in. I just did this upgrade, and it took me a lot of trial and error and sorting through various, conflicting, information on the web to get my new Results 1 - 12 of 12 Wiring harnesses and accessories for Delco 12Si series alternators.
I just did this upgrade, and it took me a lot of trial and error and sorting through various, conflicting, information on the web to get my new Having the different available clock assembly positions provides for proper exit of the wiring from the alternator, in any one of four directions, for use with different.Apr 01, · I don't think Delco ever made an OEM alternator that was designed for 1 wire operation. If you have a real OEM Delco 10si or 12si alternator, or equivalent, it should always be a 3 wire.
However, if you have a Delco that was converted to 1 wire it would have a self energizing regulator. Wiring an alternator.
This diagram shows how to wire a Delco (GM) internally regulated 3-wire alternator. This particular model (10SI, used in the s and early 80s) is the one you'll find on the generation of GM cars most often used in demolition derbies. 2 product ratings - Powermaster GM Amp 12SI Alternator w/ 1V-Pulley Natural Finish $ Trending at $ Trending price is based on prices over last 90 days.
10SI Alternator Wiring. The 10SI has three terminals (including those with a 1 wire regulator).
Converting to a Delco 3 wire alternator
The large "BATT" terminal which gets connected to your battery positive. (Or Terminal Post if your vehicle is so equipped).
And a dual terminal connector. (Repair pig-tails .
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GM 12si-Style Amp Alternator, Serpentine Pulley. Powermaster GM 12si-Style Alternator Chrome Powermaster Part Number: Alternator wiring delco 12si | BinderPlanetThe Delco SI and SI Alternators