Farmall B wiring diagram.

Looking for a complete wiring diagram. The tractor is a 1944 Farmall B. It is 6 volt positive ground. The generator is a three brush but has a voltage regulator mounted on it. It has a magnito. So the charging system is for lights and starting only.
I am finding complete diagrams for it with a cutout. But nothing showing how the lights should be wired with a voltage regulator. This is an original light switch. It seems like the jumper from the ammeter should be removed with a voltage regulator.
This is my aging Dad's tractor. He got it in a terrible stuck condition. Rebuilt it years ago and the charging system has never worked since....but now he wants it fixed.
I know the ammeter works. The generator was rebuilt with a new regulator at that time. The generator passes a motor test. I have wired it 2 different ways that I have found unsuccessfully. Both with the L terminal connected and not. Not sure if the Voltage Regulator is good or not. I have attempted to polarize the generator. But found differing opinions on how to do so.
Sorry for the long winded explanation. But I have had enough googling to try and find my answer. Billsboy

This post was edited by Billsboy on 01/30/2023 at 03:14 pm.

First of all, does it REALLY have a voltage regulator, or the large OEM ''cutout'' that looks like a 2-unit VR from the outside?

As to polarizing, you did that when you ''motored'' the generator.

Try this, monitor the voltage on the generator's ''A" terminal and ''full field'' the generator by jumpering the generator's ''F'' terminal to a good ground. what does the voltage at the ''A'' terminal read?

My Troubleshooting Procedure can help find the cause of not charging regardless if it has a full fledged
3 terminal Voltage Regulator (BAT ARM FLD) or 4 terminal VR (BAT ARM FLD LOAD) or the older 2 wire Cutout
Relay (BAT ARM) that uses a manual Low High light switch charge control......The lights typically are fed
off the LOAD (NOT battery/starter) side of the ammeter with a 3 terminal VR or cutout relay but the LOAD
terminal if a 4 terminal VR.

Look at my Troubleshooting Procedure and especially the test where you temporarily dead ground the Gennys
FLD post to see if it charges then but NOT otherwise which tells you the genny itself is okay...If it
charges with gennys FLD grounded (tells you genny is okay) but NOT otherwise the VR is bad or not wired
right OR NOT WELL GROUNDED.......... It also tells how to polarize the generator which you should do FIRST
BEFORE start up. NO charge with FLD grounded typically means the Genny is bad since the VR function is
then by passed.......If it passes BOTH my Motor Tests (see para 5) then genny itself is likely okay so
again the VR may be bad or mis wired or not grounded BE SURE VR HAS A GOOD GROUND

https://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=ttalk&th=2060825

John T
John Ts Troubleshooting

There is a diagram in this previous post for a Super H. I
believe it should be close enough for reference.
Previous YT post

is the regulator made for the Delco 1101355 generator. Regulators were made to replace the cut-outs. One of my Bs has that
regulator and has worked for the last 40yrs just fine.

While not completely open. The resistance between the the VR's Arm and Bat terminals is very high. In the meg ohms. Yet wnen I grounded field term and jumped Arm post to Bat on the regulater I still did not see a charge. I actually saw a slight drop on the ammeter when I grounded the feild terminal. That did not change when I jumped the Arm post to the Bat on the VR...
The generator does motor....the battery is starting the tractor and will charge on a battery charger. The tractor is now wired per the diagram that was shared in this discussion.
Any thoughts before I buy a new VR to try?