One wire Alt- How should wiring be ? - Team Camaro Tech
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post #1 of 6 (permalink) Old Sep 22nd, 07, 12:13 PM Thread Starter
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One wire Alt- How should wiring be ?

When I bought my camaro it already had a 1 wire alternator installed. Before I go and replace the battery, can soeone tell me how the wiring should look for the Alternator?

Currently all i see is a red wire from the Alt to the +battery cable.
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post #2 of 6 (permalink) Old Sep 22nd, 07, 01:11 PM
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Re: One wire Alt- How should wiring be ?

Thats about it. Typically the alternator wire would be connected to the terminal block behind the battery or the hot buss of the horn relay though.

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post #3 of 6 (permalink) Old Sep 22nd, 07, 01:56 PM Thread Starter
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Re: One wire Alt- How should wiring be ?

On mine..There is only 1 red wire coming out of the post on the alternator, running back behind the motor and around to ? i then have a red wire that connects up with this one somewhere and runs to the Pos bat teminal.

I just installed a new alternator and am only seeing 12.6 Vat the battery with the car running. I checked at the back of the Alt/ ground on Batt and am seeing the same voltage...

If i am not mistaken I should be seeing 13.5-14 at the battery when running... (I had the Alternator tested before I left the parts store)
Could I have a alternator that doesnt support the single wire set up? Do I need a ground wire for the alt?(All chrome brackets around it)

Its 75 and sunny and I cant take the car out!!!

Anyone have any ideas?

1968 Camaro
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post #4 of 6 (permalink) Old Sep 22nd, 07, 04:27 PM
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Re: One wire Alt- How should wiring be ?

Or Alternator to starter lug where the Battery positive cable connects.

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post #5 of 6 (permalink) Old Sep 22nd, 07, 10:08 PM
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Re: One wire Alt- How should wiring be ?

With the one wire alts, make sure you get the rpms up before you measure anything. They usually don't start to charge until you hit 1000-1500 rpm. Once they start charging, they will keep charging even at idle.
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post #6 of 6 (permalink) Old Sep 23rd, 07, 08:39 AM
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Re: One wire Alt- How should wiring be ?

one wire alternators are really only good for tractors whose only use for an alternator is to charge the batter so it can start again later. our cars are much more complex than that and really need the three wire set-up. see madelectrical.com for more info and explanation. and the one wire is very hard on your battery! be sure to check water levels frequently and don't use one of those 'no-maintenace' batts, cuz when you vaporize all the water out, you can't replace it.
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