not putting enough voltage out

72duster72 · May 28, 2020

I have a 69 road runner seem to be having a charging issue. I have an SDC serpentine pulley system so the alternator is a single wire,like out of a Dakota. My volt gauge is only reading 12 V can a voltage regulator prevent it from charging to 14 V. Had the alternator tested and it’s putting out enough voltage. Any help would be appreciated.This by no means there’s a Stocks set up fuel injection MSD all that good stuff.

Moparnocar · May 28, 2020

Make sure you have a good, clean ground on the regulator. Also see if you have 12v to it on key up

72duster72 · May 28, 2020

72duster72 · May 28, 2020

Are you talking about the mounting surface?

Moparnocar · May 28, 2020

72duster72 said:
Are you talking about the mounting surface?

Yes, it ground through the case. Make sure main car grounds are good too

Moparnocar · May 28, 2020

72duster72 said:
View attachment 956506

Oh, ok, I thought you had the newer style

You got 12v at the IGN terminal w key on?

72duster72 · May 28, 2020

Ok i will try that

Moparnocar · May 28, 2020

I re-read your post. You have some aftermarket single wire alt on there? Not the Mopar w 3 wires in the back?

BB BELLA · May 28, 2020

I thought 1 wire has internal regulator!

72duster72 · May 28, 2020

Correct on the alternator it’s a single wire found on dodge Durango’s

BB BELLA · May 28, 2020

you have it wired to another reg?

72duster72 · May 28, 2020

This is the back of the alternator

Moparnocar · May 28, 2020

Some who knows the newer stuff will have to chime in. The Durango alt may be computer controlled, I'm not sure. There would be no where to even hook up that regulator

BB BELLA · May 28, 2020

apparently the pcm controls voltage on the durango 1 wire so you will need to reg it externally!

Moparnocar · May 28, 2020

I guessed 99 ish, looks like it does run to a PCM. Im not sure it will work with that regulator. It may work with some type of digital signal

BB BELLA · May 28, 2020

youtube video, how to

BB BELLA · May 28, 2020

get a 1 wire with internal reg, easy!

72duster72 · May 28, 2020

It’s not that easy just to get a one wire alternator with the regulator. That particular alternator fits my serpentine belt set up

Moparnocar · May 28, 2020

BB BELLA said:
I thought 1 wire has internal regulator!

There are some aftermarket ones that are, but Chrysler's are usually pcm controlled. Same as old style regulator, only uses a digital signature vs old open/closing points to regulate voltage

Moparnocar · May 28, 2020

72duster72 said:
It’s not that easy just to get a one wire alternator with the regulator. That particular alternator fits my serpentine belt set up

Can you swap/modify the pulley to work on a old Mopar alt?

not putting enough voltage out

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