Voltage regulator.....

Sam Womer (PA) · Jul 25, 2018

I have a generator(12 V) from a mid fifties Chrysler on my '38 Chevy. I also have the Delco Remy regulator that goes with it. Since I am rewiring the whole car I need to make a new connection between the generator and the VR. Problem is the terminals on the VR are not marked. Obviously one terminal goes to the battery and the others go to field and armature. I don't want to make a mistake and damage something. There are three coils inside the regulator, one has much finer wire. Does that connect to field or armature? I don't know much about electricity, I have never seen it but I have felt it.."...

Janicholson · Jul 25, 2018

The regulator can be chucked and a solid state unit can be used as shown in the diagram attached. One shows the mechanical, the other the early 60s solid state unit. Jim

Steve@Advance · Jul 25, 2018

This is a typical Delco regulator.

The one with the fine wire is the field.

If it doesn't look like this, do some more searching for one that does. Pay attention to the contact configuration differences on the cut out and current limit. Match that up and it will be right.
Delco Regulator

John T · Jul 25, 2018

One way to identify which terminals are which on a Class A 3 terminal (BAT ARM FLD) Voltage Regulator I have successfully used is as follows (may or may not work on allllllllllll VR's, be warned):

I used an ohm meter on a relatively low ohms scale say 100 and attach one lead to the case/frame/ground metal and probe with the other end.

BAT should have near infinity ohms like an open circuit it is under those condition.......
FLD would be very low ohms maybe less then 10 down to near zero, depends on the particular VR....
ARM may be in the range of say 20 to 50 or so ohms as that's the shunt winding portion of the cutout relay.

NOTE this is NOT intended as exact, only ohms ranges with BAT highest, FLD lowest, ARM mid range and again, it MAY NOT WORK OR BE TRUE FOR ALL VR'S so don't anyone have a calf, I'm ONLY saying its worked for me.

John T

JMOR · Jul 25, 2018

(quoted from post at 16:36:12 07/25/18) I have a generator(12 V) from a mid fifties Chrysler on my '38 Chevy. I also have the Delco Remy regulator that goes with it. Since I am rewiring the whole car I need to make a new connection between the generator and the VR. Problem is the terminals on the VR are not marked. Obviously one terminal goes to the battery and the others go to field and armature. I don't want to make a mistake and damage something. There are three coils inside the regulator, one has much finer wire. Does that connect to field or armature? I don't know much about electricity, I have never seen it but I have felt it.."...

am, my e-mail is open in Modern View. Send me pictures of bottom, top (front rear with cover off) & I will tell you the terminal configuration.

sotxbill · Jul 25, 2018

If the battery is still in in and has a charge...

Of the two large wires on the reg, one will measure same as at the battery...
or read zero ohms between the batter connector and the "B" terminal on the regulator as that wire runs between the B terminal and the "hot" battery terminal.

The other bigger wire will come from the armature of the generator to the A terminal... or measure zero ohms between the two locations.

The smaller field wire.... will run from the field lug on the generator to the regular Field and measure zero or near zero between the two locations.

The "HOT" post is the battery cable is is NOT grounded to the chassis. usually its the positive post on a 12 volts..

Bob · Jul 26, 2018

"I also have the Delco Remy regulator"

"the terminals on the VR are not marked"

Look closer, I can't ever recall seeing a DR VR for a generator system without the terminals marked.

Voltage regulator.....

Sam Womer (PA)

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Janicholson

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Steve@Advance

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John T

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JMOR

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sotxbill

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Bob

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