Wiring diagram for Ford NAA tractor

johnnymac · May 15, 2011

I need a wiring diagram for an NAA Ford tractor. It is the one with a 1 wire alternator, volts gauge and solenoid. The solenoid is NOT on top of starter. Also how many studs are on junction block. I got me a tractor with a complete wiring hack job and need all the help that I can get. Thanking all for any help you may have.

Bob · May 15, 2011

How many terminals are used on the starter solenoid... 3 or 4? Is the tranny-top neutral-safety start switch in use? (HOPEFULLY!)

The factory junction block would have had two terminals. one for each wire from the ignition switch. Ignore the Ammeter in the diagram if you're not using one.

<img src = "http://i56.tinypic.com/28hmoih.jpg">

Dell (WA) · May 15, 2011

johnnymac.......the original NAA starter solenoid is a 3-wire that mounts on the steering column sheetmetal. The little middle terminal is GROUNDED by the BIG starter thumb switch by the tranny shifter. Since you could have a "Bubba" conversion, quein sabbi, si? There are probably 4-versions of the 4-terminal NON-tractor starter solenoid that could have been canibalized because they are 12-volt. Surprizingly enuff, the original 3-terminal 6-volt solenoid is plenty strong to use on 12-volts. I strongly recommed using the 3-terminal 6-volt solenoid on yer 12-volt conversion.

Remember, the 1-wire 12-volt alternator needs to be jazzed to about 1800rpms before the internal voltage regulator kicks in. Once in, it will charge at 500rpms.

Don"t miss-confuse voltmeter with the original ammeter. Either works when correctly installed. ...BUT... neither can be willy-nilly interchanged. .......Dell, a 12V advocate for the right reason

Wiring diagram for Ford NAA tractor

johnnymac

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Bob

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Dell (WA)

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