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Old 01-29-2011, 10:55 PM
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alternator swap help needed

Ok I'm swapping the original alternator from my 74 nova with a higher voltage one. The original one utilizes a white plug with a red wire and a black wire coming out of it. The new one utilizes a plug with a red wire, black wire and a brown wire as well. What is the brown wire for? Can I just cut the old plug off and connect the red wire and black wire on the new plug to the existing wires from the old plug ? Thanks in advance!!

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Old 01-29-2011, 11:18 PM
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Alt.

You mean higher amperage alt, same voltage. Is the plug the same style or is the alt a newer style type. If the plug is the same type then it can be used in place of the old one.
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Old 01-29-2011, 11:20 PM
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its a newer style I just have no idea how to wire it
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Old 01-29-2011, 11:30 PM
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alt.

So it is probably a cs130 style alt, usually 105 amp. I have wired a few but that's a few years ago, I do know one wire jumps to the main post at back of alt for power, I think red wire, and one of the other wires is an ignition wire or keyed. So basically your two wires can be connected to two of the three wires and it will work just like the old one but have more amperage. I wish I remembered, should be some wiring info on line if you look. At least you know it is a CS130 style alt.
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Old 01-29-2011, 11:36 PM
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Thanks that's all I'm lookin for I dont much care what the brown wire is for as long as its not completely necessary to use it
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Old 01-29-2011, 11:43 PM
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wiring

At http:///www.zuwharrie.com/gallery/th...php?album=1368 shows all the wiring types. Don't know if you need all of that to look, it's on installing a cs style on a suzuki sidekick.
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Old 01-29-2011, 11:49 PM
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alt

Ya I clicked on my own listing and it worked, just remember to test you 2 wires to see which one is live and which is keyed. good luck.
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Old 01-30-2011, 02:24 AM
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Ok I can test the two from the car harness but how do you tell which of the wires in the plug needs to be wired to live and keyed? Surely red is live and black is keyed on the plug right?
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Old 01-30-2011, 02:29 AM
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Go to www.novaresource.org there is a section in Technical Info on wiring conversions for newer alternators into older cars, it will tell you everything you need to know to get it right.
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