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Old 08-19-2010, 08:51 AM
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alternator wiring issue.

hey guys. well recently replaced alternator on engine was a one wire alternator which also had another smaller red wire that ran somewhere else to the car/engine both wires were from the one output in the alternator. now the new alternator is a two wire. the one positive terminal and another output with is black and am assuming is a ground that I have nothing connected to. I changed the older alt. because it was overcharging, now the new one is not charging or is draining the batt. I have been looking into it and have read of a field wire? is this what I need? Is there anything I have to change now that the alt. has two connections? why was the first alt. doing fine before it overcharged without a field wire?
both alts are from an 85 camaro 305 ohv
thanks

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Old 08-19-2010, 09:41 AM
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Quote:
Originally Posted by 56dodge
hey guys. well recently replaced alternator on engine was a one wire alternator which also had another smaller red wire that ran somewhere else to the car/engine both wires were from the one output in the alternator. now the new alternator is a two wire. the one positive terminal and another output with is black and am assuming is a ground that I have nothing connected to. I changed the older alt. because it was overcharging, now the new one is not charging or is draining the batt. I have been looking into it and have read of a field wire? is this what I need? Is there anything I have to change now that the alt. has two connections? why was the first alt. doing fine before it overcharged without a field wire?
both alts are from an 85 camaro 305 ohv
thanks
If you want help, more information is needed. Do you know what style alternator you have.

If it is a 10SI the large stud on the back will be directly connected to the battery positive through a jusction somewhere.
The #1 wire should be hot and fed through the dash light or a resistor of approximatly 35 OHMS, the #2 wire is the sense wire and should be connected to a hot lead near the fuse box. Some people will just jump this to the stud on the back of the alternator but it is not optimal.
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Old 08-19-2010, 10:35 AM
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You might want to take a look at this thread:

Alternator wiring is wrong
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Old 08-19-2010, 05:50 PM
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well i dont know what alt it is since its from autozone
http://www.autozone.com/autozone/par...0_188901_4678_

I have been looking at that thread before I posted I understand the second image, could I rig up the number one wire to the batt connection
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Old 08-19-2010, 07:02 PM
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Quote:
Originally Posted by 56dodge
well i dont know what alt it is since its from autozone
http://www.autozone.com/autozone/par...0_188901_4678_
Kinda hard to tell from that picture, but I'm guessing it's a 10SI, so the info in the other thread applies.
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