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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

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Old 08-24-2009, 11:29 PM
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Alternator/Voltage Regulator Wiring

I removed my generator from my 60 F100 and installed an alternator from a 1964 or 65 F100. Had to modify an upper bracket and space it away from the motor to make the pulleys line up, but it aligns well. I'm kind of stumped by the wiring though...on the back of the alternator there are three posts--one red, one black and one white. My voltage regulator has three prongs coming out of it labeled: BAT, FLD and ARM. The BAT post has a yellow wire leading to it from the starter solenoid. My question is, where do I connect the wires leading from the alternator to the voltage regulator? Thanks...
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Old 08-25-2009, 03:17 AM
Julies Cool F1 Julies Cool F1 is offline
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I would recommend that you connect them to the alternator and regulator!

Ok now that you are ready to slap me, I'll give you the bad news. If your regulator has BAT, FLD and ARM on it, it is a regulator for a generator not an alternator. I hope you weren't thinking of using the existing generator regulator with the alternator. That's a "no-no."

Alternator regulators from Ford should have four posts. They are marked "B" (for Battery, or possibly "A" for Alternator Power) "F" (for Field); "S" (for Stator); and "I" (for Ignition). The back of the alternator should likewise be labelled (Batt, F, S....No I) next to the appropriate lugs.

Here is a generic drawing I drew up and another posted some time ago by another member. Take your pick!

Name:  D F1 Traditional Ignition and Charging System.JPG
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Click the image to open in full size.

Connect "S" terminal on the Alternator regulator to the "S" (or possibly STA[T]) terminal on the alternator

Connect the "F" terminal on the Alternator regulator to the "F" (or possibly FLD) terminal on the alternator

In the drawings, the "Alt Power" (or Battery) wire coming off the battery lug on the alternator, and co connected to the "A" terminal on the Alternator regulator ends up on the "Batt" terminal of the Ignition Switch - if you have the stock "Amp" guage. Then there is a wire that runs from the "Batt" terminal of the Ignition Switch through the Ammeter indiction loop and ends up on the "Batt" post of the Starter Solenoid. The "I" terminal on the regulator is not used when wired like this.

If you have a Volt meter or "Batt" light, the red wire runs directly to the "Batt" terminal of the Starter Solenoid, and the wire from the "I" terminal runs to the "Batt" light or Volt meter.

I'm assuming this truck has been converted to 12 volt negative ground and you have some other points for power distribution (like a fuse block or the ignition switch) that you are using to distribute power out, and not using the stock 6 volt 30 and 15 amp circuit breakers located on the instrument panel (Which is where the power wire would have gone from the generator regulator "Batt" terminal in a stock 6 volt generator set-up.)

Glad you asked?
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Old 08-25-2009, 09:38 AM
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Julie, nice diagrams but a couple comments;

I would run the alt BAT on your Trad diagram from the alt directly to the solenoid, it needs to be 8 or 10 ga. and have a fusible link.

On your 2nd diagram, it seems like "Alt Pwr" and "Solenoid pwr" should be connected?
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Old 08-25-2009, 11:07 AM
Julies Cool F1 Julies Cool F1 is offline
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Originally Posted by ALBUQ F-1 View Post
Julie, nice diagrams but a couple comments;

I would run the alt BAT on your Trad diagram from the alt directly to the solenoid, (it is) it needs to be 8 or 10 ga. and have a fusible link. Yes that is how I have mine, Ross, but if you want your stock amp guage to work and show any discharges, then it has to be wired as I described - unless you have a fuse panel, then it should go to the fuse panel - then through the gauge on to the solenoid. Same flow path as the stock wiring, just using different points for distribution other than the 6 volt circuit breakers. Can be done lots of different way, this just seemed like the most direct.

On your 2nd diagram, it seems like "Alt Pwr" and "Solenoid pwr" should be connected?
That is correct, and it's that way in the first drawing. As I mentioned, I borrowed the drawing from another post by another member - dont' know why he didn't do that, but perhaps he was using some type of cannon plug and wanted to show it. I thought it was how I described it that way in what I wrote:

"If you have a Volt meter or "Batt" light, the red wire runs directly to the "Batt" terminal of the Starter Solenoid"

It's hard to describe this stuff in written post and make sense without being confusing. I have a picture in my mind and know what it looks like, th eproblem trying to convert that to text and make sure that when you read it, your mind develops the same picture.

If you have ANY questions, feel free to ask and I'll try to confuse yousome more.
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Old 08-25-2009, 11:27 AM
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Yeah, I missed the part about the ammeter, but I'm not sure in '60 they worked that way?

My concern would be physically terminating a #8 wire lug on the screw-post on the regulator.
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Old 08-25-2009, 11:32 PM
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Julie, THANK YOU SO MUCH! I'm taking the truck to a buddy's house after work tommorow. I'm sure your diagrams will help a lot!! I'll update when we're done...
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Old 08-26-2009, 01:57 AM
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Originally Posted by ALBUQ F-1 View Post
Yeah, I missed the part about the ammeter, but I'm not sure in '60 they worked that way?

My concern would be physically terminating a #8 wire lug on the screw-post on the regulator.
I guess if I'm going to post that pic, I should cut off the bottom of it and redraw the lines.

Fact is there are about five different ways it can be done and it depends on whether or not his alternator needs an exciter, type of gauge (think it's a light in the 60)? fuse blocks? rated output? Draw?

So there could be a number of options.

I'm not sure I follow you on the terminating the #8 wire on the screw post of the regulator....did you mean Ignition switch? See, even I get confused!
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Old 08-26-2009, 09:49 AM
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Your colored drawing shows the BAT wire from the alt (which is #8 or #10 ga) going to the "A" post on the regulator; a lug for that size wire is usually larger than the screw post on a reg. Electrically it may be correct but physically doing it might be difficult.

Yep, I think by '60 they were using an idiot light. Were the ammeters even used then, and if so, did they have a loop or posts? Beats me!
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Old 08-26-2009, 11:47 AM
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Ah ok.

The older regulator I had (before I went to one wire) had metal tabs and I think was designed to take a one piece nylon plug. But it had flat tabs designed to slide on a (female) connector, and not an "Eye" connector with a machine screw like the generator regulators. So I was able to use a "yellow" slide on connector with a 10 AWG wire (which should be more than sufficient at 12 volts with a 50 or less amp stock alternator). And usually (although I prefer to combine them into a single connector) you can splice them together farther down line (like the second drawing shows).

That drawing was one of the first I did and I could probably dress it up a bit. When I did that one I was more interested in showing signal flow and not so much the actual connect points. And I think this is the first or second time I've used it. So I'll take a look and maybe even color the wires.


See there we go again with the unknowns - alternator rating, does he have any big draw items like fans, wire size needed, etc. etc.

The 60s was a blur to me too!
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Old 08-26-2009, 11:47 AM
 
 
 
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