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Topic Review (Newest First)
11-15-2012 04:51 PM
1971BB427 The low voltage relay is probably going to be your easiest way. The 12v. can go across the contacts, and then the coil of the relay is fed from the alternator. If voltage drops the coil out the contacts close and the red light comes on.
Some one wire alternators have an internal jumper from the one wire to the internal regulator and can be opened up and that lead tapped to attach a wire to an idiot light, but it might void your warranty on the alternator.|
Another method is to get a std. GM 3 wire alternator and jumper it to make it a one wire, then use terminal #1 to feed the idiot light. In these alternators you have a single wire off the post to the battery to charge, then there are #1-#2 post, and a jumper from #1 to the bolt on post makes it a one wire, and #2 is the indicator.
Like this:
11-14-2012 04:49 PM
35WINDOW There may be easier ways, but this is what I think of when I see someone in your situation:

LS-11 Lo Voltage Sensor-Ron Francis Wiring
11-14-2012 04:28 PM
knight hawk
One wire Alt with gen red lite ?

I'm re-wiring a'55 T Bird, and convert it to 12 volts. The owner suppleiied a 1 wire alternator and a CHEAP wiring kit. Got all the wires in and working, except the original gen charge lite. Is it possible to hook it up somehow to the ! wire alt ????? I under stand how the gen lite works, but those wires are not available with ! wire alternator. IF, it was my car , I'd install a voltmeter. I would like to try to user the red lite.........How can I wire a ! wire alterntor inot the gen red ?????.thanks

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