The markings on Ford voltage regulators differ. Some are F234, some are IASF. On a typical Delco 3 wire alternator with connection markings of FLD,BAT,STA and GRD, how would either of those rwo regulators be connected?

For example,

F->FLD
2->
3->
4->

I->
A->
S->
F->FLD

 

I am not familiar with the F234 markings. What year vehicle did that come from?

I am familiar with the IASF.

I=ignition-this gets a 12v signal from a ungrounded light bulb in the dash. The other side of the ungrounded light bulb goes to the keyswitch. This sends voltage to the regulator to bring the charging system "online" and ready to charge. When the alternator starts turning and has output, the regulator puts 12v on this I terminal. 12v on both sides of the ungrounded bulb in the dash makes the light go out.

A=feedback voltage terminal for the regulator. This is what the regulator uses to determine how much the output the alternator should have. This usually runs a short distance to a wire that has the battery voltage on it.

S=stator connection to the alternator. This terminal is also used sometimes as a "online" trigger instead of the "I" terminal. This is for trucks that do not have a "gen" light in the dash, and you will find the "I" terminal is left blank in those setups.

F=field terminal, simply a wire going from the F terminal to the field terminal of the alternator. The regulator varies the voltage on this wire, and that varies the output of the alternator.

On the Delco alternator that is self explanatory, field goes to field, sta goes to the stator bat is battery and grd is ground.

That's the older type delco, I prefer the late 70's early 80's delcos with the built in regulator. You have a large bat connection for the output to the battery, and two small terminals labeled "1" and "2". The 1 is the "online" trigger and is hooked to one side of a ungrounded bulb in the dash with 12v keyed pwr on the other side. The 2 is the feedback wire for the regulator, and can be simply jumped to the large bat terminal. I have one of these alternators on my 86 ranger right now. It came out of 86 monte carlo and replaced the Ford 2G that had failed, and likes to catch the plug in on fire.

 

Hi Dave, thanks.

On a project I have a Ford Ranger 2.8 in a Sunbeam Alpine. The 2.8 came with a newer 3 wire Delco alternator. I found an article that shows how to use a Delco alternator in an Alpine using a Delco voltage regulator but thinking along the lines of my Ford 2.8 alternator I bought an 85 Ranger 2.8 voltage regulator, which is apparently different (at least in markings) from the Delco regulator.

M33 - Fitting a Delco Alternator to a Series V Alpine - Tigers East/Alpines East

The article diagram shows the 3 wire connection to the alternator but the alternator markings show F (FLD), BAT, and R? going to the (Delco) regulator #2 connection.

I've been trying to figure out how to use the Ford regulator when apparently I should be using a Delco regulator per the diagram.

After getting more information, I think the diagram is correct in that there are only two connections between the alternator and regulator. One being F (Field)->F (F->FLD) the other being #2->R (S->STE). I think the other connections would be, #3-> +Power (A-> +Power from Ignition Run) and #4->Warning Light Circuit (I->Warning Light).

Does that seem right?

 

If those letters above are in reference to the Ford regulator, A needs to go directly to the battery, not a key-on circuit.

I see no reason why the Ford regulator would not work with the Delco alternator.

 

Thanks Dave.

One other thing, I noticed in the article the author writes to connect not only connect F to F, but also connect #2 to F, yet the diagram shows #2 being connected to R?

 

I now have new regulator (pretty inexpensive from O'Reilleys) to go along with the Delco alternator like I probably should have to start with, it has the same markings as in the article, F234. So I'll connect #3 directly to the battery via the the + solenoid post as per the article diagram.