Rewiring (voltage reg) help needed

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Feb 18, 2013 | 06:30 PM

TigerRat

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Rewiring (voltage reg) help needed

1949 Ford F1 chopped and channeled on a 1972 Ford F100 frame with a Ford 390 C6 trans. I got an EZ wiring harness and got started and then stuck with engine wiring. Solenoid connections are easy but seems I am missing the voltage regulator (I A S F on wiring diagram). Paid special attention when taking out the old wiring and didn't see anything that resembles a voltage regulator so either its well hidden or my truck doesn't have one (possible?). This is a rod and I am a novice, anyone know where I should find it? Can a vehicle run without one?

Feb 18, 2013 | 06:52 PM

ALBUQ F-1

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From: NM

Quote:

Originally Posted by TigerRat

... Can a vehicle run without one?

Not for long!

Duralast/Voltage Regulator (VR730) | 1972 Ford F100 1/2 ton P/U 2WD 8 Cylinders H 6.4L 2BL OHV | AutoZone.com_

Just get one for a '72 F-100 and wire it up. It's possible someone replaced the original alternator with one that has an internal regulator, what connections are on the alternator?

Feb 19, 2013 | 01:00 AM

old_dan

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From: Morgan Hill, CA

If you could, post a pic of the alternator. Maybe you have an internally regulated unit??

Dan

Feb 19, 2013 | 05:48 PM

TigerRat

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Quote:

Originally Posted by old_dan

If you could, post a pic of the alternator. Maybe you have an internally regulated unit??

Dan

Here you go

Load Boss - no other numbers I can see
http://www.flickr.com/photos/9335496...n/photostream/
http://www.flickr.com/photos/9335496...n/photostream/

1 and 2 stamped on casing at BDC position where you can see a rectangular slot (at the height of the copper cable extending from the insulation. EZ says it is inbuilt voltage reg and I only need one of his 3 cables - alternator power and no need for solenoid power or ALT Excitor

Thanks for any guidance/help etc.

Feb 19, 2013 | 06:08 PM

old_dan

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From: Morgan Hill, CA

I can't tell from the pics.... There might be one other connector that goes to the ignition switch... That one provides power to that internal regulator.
Dan

Feb 19, 2013 | 06:27 PM

ALBUQ F-1

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From: NM

It looks like a GM one-wire, except for the mount.

Feb 19, 2013 | 09:25 PM

53FOPAR

Tuned

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From: Pensacola, FL

Quote:

Originally Posted by ALBUQ F-1

It looks like a GM one-wire, except for the mount.

I agree, it looks like the single wire GM. See if you can pull some numbers off the alternator or take it in to NAPA and get some info on it. If it is the single wire GM, you won't need the voltage regulator or the white excitor wire in the EZ wire kit. You will use only the red alternator power wire.

Don't forget, if it's 80 amp or more alternator, you should use the bypass wire included in the EZ wire kit. If it's not 80 amp or more, it might be a good time to upgrade the alternator, especially if you're going to run an electric fan and/or AC.

A single wire GM has the voltage regulator built into the alternator and does not use an external regulator.

Last edited by 53FOPAR; Feb 19, 2013 at 09:29 PM. Reason: Add info