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Discussion Starter · #1 · (Edited)
I have a 56’ Chevy 3100 and just recently went to go crank it and it was dead. Went to charge the battery and as soon as I did the voltage regulator started buzzing. I’m assuming that means it’s bad? Any ideas on where to start to see if it’s a bad regulator(already have a new one) or if the wiring caused it to go bad? I’m planning on redoing the wiring since it’s mostly original and pieced together. The truck is a 12v system and all I’ve found on the voltage regulators for it are for the 6v generators… is there a real need for it on this truck?

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Easier and in the long run deal would be a swap to an internal regulator type alternator.
You’ll likely prefer one when you rewire the truck.

You got any more pics of the truck and motor.
 

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Discussion Starter · #3 ·
I have a 56’ Chevy 3100 and just recently went to go crank it and it was dead. Went to charge the battery and as soon as I did the voltage regulator started buzzing. I’m assuming that means it’s bad? Any ideas on where to start to see if it’s a bad regulator(already have a new

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Easier and in the long run deal would be a swap to an internal regulator type alternator.
You’ll likely prefer one when you rewire the truck.

You got any more pics of the truck and motor.
Any suggestions on alternators?
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Discussion Starter · #8 ·

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Discussion Starter · #10 ·
Shortest distance between A and B is a 3 wire Delcotron. You can disconnect the old mechanical regulator and leave it in for visual effect.

Bogie
Thank you! I’m gonna go with the integrated alternator and clean up the fire wall when I do it. Would the 3 wire be better than a single wire integrated one?
 

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Thank you! I’m gonna go with the integrated alternator and clean up the fire wall when I do it. Would the 3 wire be better than a single wire integrated one?
I like the 3 wire simply because it is less sensitive to engine RPM to get itself excited. Nothing wrong with a one wire as long as you realize that some of them need you to goose the throttle to get them delivering electrons.


Bogie
 

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Discussion Starter · #13 ·
I like the 3 wire simply because it is less sensitive to engine RPM to get itself excited. Nothing wrong with a one wire as long as you realize that some of them need you to goose the throttle to get them delivering electrons.


Bogie
Thank you! I found a one wire that cuts in at around 800 RPM. Gonna give it a shot and see what happens lol
 

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Discussion Starter · #14 ·
I use a plain old GM one wire. Volt meter instead of amp gauge. I connected the alternator to the bat wire/connection at the regulator then unhooked the "in" connection at the amp gauge and hooked same to "out' stud.
Been that way for 12 years.

Ben
Thank ya! I’m gonna go the one wire route and see how it does
 

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Whatever you do, DON'T try "poke and hope" by blindly tweaking the adjustments in the regulator. The end result is often a burned up wiring harness and/or generator.
 

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You need the proper manual and the right tools (multimeter, contact burnisher and sometimes a set of load resistors). Follow the procedure exactly, don't assume that any step is close enough.
OR get a 1 wire alternator. The ones that look like a generator / early alternator are available if period looks are your thing. Leave the regulator and dead-end the wires.
 
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