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Old 02-03-2010, 03:24 PM
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wiring and charging problem.

I need help here is my problem. i am wiring a charging system with a Chevrolet alt. main wire coming off alt. is a 10ga with a fuse-able link.That is going to stater solenoid. The two wires on top of the alt. are tagged #1 and #2. #2 is a short pigtail that goes to the post on the alt. where the wire is attached that goes to the starter.#1 wire is run to the acc. side of the switch.
Problem- when all wires are hooked up volt gauage reads 16 volts and motor runs rough (misses like it is out of time.)when it comes off idol.When you unplug the two wires on alt.#1 and #2 volt gauge reads 12 volts and motor runs alright. any ideas.....
I am running a duel point mallory with an accel coil.

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Old 02-03-2010, 03:58 PM
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read this thread...


the mad electrical alt article mentioned is in the knowledge base link at the top of this page under the electrical section...
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Old 02-03-2010, 04:23 PM
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Alt Conversion

Hey DS, The #1 wire is needs to go to the alt. dash light, the other side of the light goes to the ign. switch. If this is an older GM car or truck that had an external voltage regulator, you can hook up the brown wire to the #1 wire. The brown goes to the dash light. Sometimes, when connected this way, you can get a condition where the engine will continue to run when you turn off the ign. sw. If that happens, you'll have to add a diode in that brown wire to block any current flow when the key is off. Do a goggle search for gm alternator conversions and you'll find tons of info to guide you. Even if you have a volt gauge, its still a good idea to have the idiot light in case your alternator fails unexpectedly. olnolan
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