Can I run an Idiot light on a single wire Alternator? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-15-2006, 10:20 AM
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Can I run an Idiot light on a single wire Alternator?

I may have screwed up buying an alternator online.

I want my project car to have an original clean looking dash panel ('57 Ford). That includes using the Idiot light to monitor the electrical system. Where I expected to hook up the excitor there is a rubber plug like (I guess) the three wire alternators have (Geez, they really mean a single wire).

How can I connect the Idiot light with the single wire alternator?

Thx in advance, r

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Old 12-15-2006, 10:32 AM
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I don't know that I can help you with your dilema, but what I did was purchase a Powermaster XS Volt series alternator. It is a single wire hook-up, but it also has a small micro box on it that can be used for remote voltage sensing, hook-up of a "warning" light, ect...

I was told a normal one wire alternator can't do anything except charge the battery?

-Michael
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Old 12-15-2006, 04:16 PM
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Doc here,

On a Single wire Alternator there is NO Provision for an Idiot lamp.

If you wish to run one I suggest you exchange it for a 3 wire Alternator, Your far better off anyway..you have remote sensing and the lamp provision, plus you don't need the "RPM" bump to start it charging, as you would need with a 3 wire.

A 3 wire is a much better Choice for a street driven Vehicle.

Doc
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Old 12-15-2006, 04:21 PM
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I'm afraid it is mine now. Can I convert it by changing out the regulator?

thx, r
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Old 12-15-2006, 04:30 PM
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Doc here,

That would be a question for powermaster...


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Old 12-15-2006, 05:14 PM
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Just got an e-mail back from where I purchased the alternator. All I need to do is remove a rubber plug and the single wire will become a three wire. If I had gotten a three wire I could NOT go to a single wire; one way if you know what I mean.

btw, I priced a three wire regulator from NAPA and about $32. That is what I was thinking about with conversion idea. Probably easier to pick a 3-wire and sell off the 1 wire.

thx again, r
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Old 12-15-2006, 08:15 PM
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Quote:
Originally Posted by RAW
Just got an e-mail back from where I purchased the alternator. All I need to do is remove a rubber plug and the single wire will become a three wire. If I had gotten a three wire I could NOT go to a single wire; one way if you know what I mean.

btw, I priced a three wire regulator from NAPA and about $32. That is what I was thinking about with conversion idea. Probably easier to pick a 3-wire and sell off the 1 wire.

thx again, r
Actually it will not work totally the same as a 3 wire. In most cases all you need to do is change the voltage regulator to make it a true 3 wire again. You can get these regualtors at any parts store and it will probably cost less than the shipping for a new alternator. It is a very simple change. The only thing you will need to do is hold the brushes back with a paper clip or small nail as described in the previous posts.
if you have the wiring already, i would highly recomend converting it

Chet
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