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post #1 of (permalink) Old 03-28-2001, 07:25 PM
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Alternator Wireing

I have an 80 cj with the delco alternator with three terminals. currently there are only two wires to it. my haynes manual Lables the terminals as Bat, terminal #1 and Terminal #2; see attached.

currently one wire comes from the battery to the terminal labled bat and the a jumper conects bat to terminal #2.

Should there be a wire to terminal #1 and if so from where.

Thanks

Wilhlem

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post #2 of (permalink) Old 03-28-2001, 07:54 PM
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Re: Alternator Wireing

That is used for an "idiot light" on the dash. The circuit is simple, take a switched 12 volts line, and wire it in series with the idiot light, and run the other wire of the light to the #1 terminal. With the key on, and engine not running, the #1 terminal supplies a ground, and turns on the light. When you start the Jeep, and the alternator charges, it supplies 12 volts to the circuit, and two 12 volts signals turns the light off. If a diode opens or shorts in the alternator, it will make the idiot light flicker.
This circuit is usually not used if there is a volt guage installed.

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post #3 of (permalink) Old 03-29-2001, 01:56 AM
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Re: Alternator Wireing

thanks, thats one less electrical thing i dont have to worry about any more.

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post #4 of (permalink) Old 03-29-2001, 02:08 AM
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Re: Alternator Wireing

[img]/wwwthreads_images/icons/smile.gif[/img] You DO understand that the light must be one which has no ground to the dash........it would have two wires to the socket.....one for (+) and one for (-) but the shell of the light has no ground.[img]/wwwthreads_images/icons/crazy.gif[/img]

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post #5 of (permalink) Old 03-29-2001, 05:41 PM
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Re: Alternator Wireing

Yes I know it can't be grounded. I have no plans on hooking it up, I just wanted to be sure that it was not something importent.

Wilhelm

post #6 of (permalink) Old 03-30-2001, 09:27 AM
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Re: Alternator Wireing

Just wanted to add one more comment...if you ever have to replace that alternator, and don't feel like spending BIG bucks for a Mean Green, etc...check out the Delco alternators for the early '80's corvettes! Some used a 102AMP alternator as stock and they also used a 120AMP too! It's only about $100 bucks at your local parts store versus SEVERAL hundred for an aftermarket! Just my 2˘!

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