Re: GM 1-wire VS GM 3-wire???

Posted by Bob M on December 29, 2006 at 17:20:41 from (69.205.124.61):

In Reply to: GM 1-wire VS GM 3-wire??? posted by City-Boy McCoy on December 29, 2006 at 16:51:45:

Mike - For a couple bucks worth of parts you can add a warning lamp or diode to your existing alternator setup and eliminate the "battery drain" problem. Just make sure the lamp (or diode...) is between the coil side of the ignition switch and the #1 aux terminal on the alternator as shown in the diagram!

Incidentally I'm not a big fan of "one wire" alternators for several reasons: 1) They are more expensive; 2) At startup, a one-wire must be spun up to a considerably higher RPM than a 3-wire unit before it will "turn on" and begin charging; 3) Many (though not all...) one-wire units exhibit a small, standby current draw when shut down. This drain will flatten a fully charged battery if left unstarted for several weeks.

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