Thread: One wire alternator? really not the same!!
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Old 04-06-2010, 02:59 AM
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Large SI cased GM alternators actually have three terminals.

A> BAT+ for your Solenoid BAT+ Lug on the firewall.
B> Dual Terminal Side Connector ; look for the #1 connector this is stamped with a #1 on the case, this terminal is used to connect to the dash warning light,

--which is wired in series with a 12V+ IGN on only signal . in case of issue, the #1 terminal will *THEN* act as a ground wire, thereby illuminating the waring lamp.

give it a try.
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