need electrical help

AngeloB_1973 · Apr 2, 2014

just bought a 51 model super a , at a really good deal . the old guy had started going through it and i geuss he had taken the trigger starter off and was trying to convert it to a key starter with a soleniod switch. at the same time he had changed the generator to a alternator, well when i bought it it would not start. the old man had passed away and bought it not really knowing what was wrong . but after taking all the extra stuff solinoid and key switch , and putting a trigger back on the starter i was able to crank it. the problem i have is all the wireing was so screwed up i am not sure how it goes what hooks to what . esspecaily the alternator to make sure it is charging the battery. would like to keep it 12 volt just would like to wire it the right way. thanks alot

Paul from MI · Apr 2, 2014

There are some guys on this site that have good wiring diagrams for alternator conversions. Hopefully one of them will post on this. I assume this is a Farmall A, but these old tractors are all pretty basic and you can adapt a wiring diagram from one to another pretty easy, especially if you are re-wiring it completely. Big differences will be mag or battery ignition and how original looking you want to keep it.

C. Amick · Apr 2, 2014

If you look under "Research and Info" on this web site and click on "Articles", there are some articles on 12 volt conversions. Did you get it started?

Anonymous-0 · Apr 2, 2014

As far as the charging goes, it depends on if it's a one wire alternator or one that requires a battery voltage sensing wire. If it's a one wire alternator all you need is a wire from the alternator battery post to the amp gauge to the battery. If it's not a one wire you will also need a wire from the battery to the sense terminal. You can make a short jumper from the alternator battery post to the sense terminal but a wire from the battery is the better way. Hope this helps. You should be able to go to CaseIH website parts books and get a wiring diagram but depending on what you want to leave modified it will be different.

Steve@Advance · Apr 2, 2014

The wiring on the old tractors was very basic and
simple, so don't be afraid of it.

If you want to keep it 12v, one thing you need to
look for is did everything get changed over from
6v to 12v like the coil and lights.

Also it may have been positive ground. The
alternator will require a negative ground system
and the ignition coil will need to have the +
terminal wired to the ign switch, and the -
terminal to the distributor lead.

The alternator wiring will depend on which
alternator was installed. Most common is a Delco
10SI. Here's a diagram:

http://autorewire.com/tech/article/Delco10SInandd.
html

A trip to a good auto supply with wiring supplies
will be helpful. The split plastic harness wraps
make for a neater job. Soldering and shrink tubing
provide a more trouble free result.

Might take a look at the alternator mount, see how
well everything lined up, the pulley is right for
the belt size, everything is tight, etc.

Hope everything works out, you can do this!

Janicholson · Apr 2, 2014

The following will do you proud. The alternator wireing assumes either a Delco 10SI series, or a Hitachi form a mid 1980s Nissan PU. S-#2 L=#1 on the diagrams for Hitachi. Jim
Bob M diagrams

need electrical help

AngeloB_1973

New User

Paul from MI

Well-known Member

C. Amick

Well-known Member

Anonymous-0

Well-known Member

Steve@Advance

Well-known Member

Janicholson

Well-known Member

Similar threads