New wiring for 200 Farmall

Iam planning on getting a whole new wiring harness ( pre made) and swithching over to 12 volts. Running a single wire alternator. What if any changes will I have to make to the electrical system ( beside battery and alternator)To make this conversion? Also the best place to obtain a new repo. electrical harness

their not cheap so you could watch e-bay for a cheap one but if you don't care then you can go here.
walts tractors wiring harness kits

Heck for that tractor build you owen it is not that hard and a word of advice don't use a one wire alt . You are only talken even with a two wire alt. is three wires for the engine and alt. and a couple for the dash and two wires for the lites . And with the help from all of us that have done it before you can make it nice and save a bunch of money .. We can give the correct wire size and color and i can tell ya how to do the ends to look factory.

You will also need new lights...

With the few wires there are on that tractor, you might consider replacing them yourself wire for wire. As far as the 12v conversion, it is a simple job, there are diagrams floating around on this site for Farmalls.

Before spending time and all the money to change to 12v why dont you take the time to get the original system working as a 200 sure dont need 12v to start as its clear you dont know how to change. I would stay with what is original and it will be trouble free.

Mifsud: First off, cann that one wire alternator idea. Personally I'd take the current harness apart wire by wire and make my own new harness. It is one of the well paying chores in restoring an old tractor.

I'm a bit like gene with some differences. I'll never convert another C-113 or C-123 engine tractor to 12 volt from 6 volt. I will convert 6 volt generators to 6 volt alternators. In fact the very next time my 130 or 140 give electrical trouble they are going to once again become 6 volt tractors. I converted my SA and 130 to alternator in 1992, SA is 6 volt alternator, 130 is 12 volt alternator. The SA has been completely trouble free since that time. I installed a new 6 volt battery when I did the 6 volt alternator conversion, and that 6 volt battery lasted 13 years. I have never had a battery come close to that many years service before.

In 2002 we added the 140 to our tractor line up, and since electrical was screwed up we turned it into 12 volt alternator, giving us 2 - 12 volt tractors and 5 times the electrical problems. 130 is on it's 4 th battery and second alternator since 1992. I can see 140 will need a new battery come spring. I recently had the 130 starter go bad. I took it to an automotive electrical rebuilder. He pulled it apart and said, "You have this tractor on 12 volt and that is the problem. The starter has spun too fast, too often, thus centrifical force dislodged the armature whindings. The starter drive has never failed, it's just that these little engines crank too easy, thus over speeding starter." He went on to tell me he never sees this problem in big tractors. A new armature and $217. later my tractor is starting. Just my latest experience.

Someone mentioned Walt's. You can also check out wiringharnesses.com or brillman.com

Try an IH dealer (the harnesses are still offered) or Porch Electric.
PORCH ELECTRIC