1955 Ferguson TO-35 Gas wiring diagram

I am fixing up my 1955 Ferguson TO-35 and have decided to convert it from 6 volt to 12 volt. I am using a one wire alternator and am swapping the ammeter to a voltmeter. I am using the original starter but changing to a 12 volt coil.
What I really would love some help with is the wiring diagram. I can't seem to find a detailed diagram for this tractor using my original gauges (other than the voltmeter), an alternator and a 12 volt coil. Also, I have heard of some folks using an indicator light added to the dash to see when the alternator is working, not sure how to wire that either.
I am sure it's easier than I think it is, but I am clueless with electrical wiring.
Thank you in advance for your help.

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Do an image search and you'll find the updated diagram.

Add to your upgrade list a 12v starter relay.

Make sure the new coil has an internal resistor.

I used a denso 'mini'/'hot rod' alternator as the typical Delco option can get hit by the steering bar during suspension travel.

Completely different and better tractor after the conversion.

Get some 12v LED lights too.

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This post was edited by jvin248 on 03/22/2023 at 07:29 pm.

Thank you. I have not yet been successful at searching out the diagram I need. Plenty of other models or wiring diagrams for 6 volt using a generator. I will keep digging.

(quoted from post at 12:55:34 03/23/23) Thank you. I have not yet been successful at searching out the diagram I need. Plenty of other models or wiring diagrams for 6 volt using a generator. I will keep digging.

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The common Delco type alternators are negative ground. You will want to make that swap at the battery before you hook up the alternator wire, or you could burn the alternator up when you connect that wire. I recommend doing that as step one so it doesn't get forgotten until damage is done.

A one wire alternator does not require an indicator light, diode, or resistor in its wiring as it is internally wired to be self-exciting, there is no exciter wire required. Monitoring the voltmeter, you plan on installing, will tell you system voltage which gives you an indication as to charging.

Unless someone has put electrical gauges in place of the originals, I believe you will find your oil pressure and temperature gauges are mechanical. No wiring required unless they are back lit (have lights inside them).

A true 12 volt coil, for use on a 12 volt system, will be internally wound for use without a resistor and will generally have wording such as "No External Resistor Required", printed on the coil shell.

You will want to a small diameter pulley on the alternator and the width must match the existing belt.

You will need to change any bulbs or sealed beam lights it may have on it.

I modified a 6-volt TO35 drawing to show the basic circuits you will need with the alternator, based on your existing components match what the original drawing shows. Others will be along with comments but this should get you started.

Research (giggle) the JMOR electrical diagram. He usually hangs out on the Ford boards.
Lots of pictures for ya'