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Discussion Forum

Re: 1973 Ford 4400 wiring diagram

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Author  [Modern View]

09-20-2012 05:32:21

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Ok, I dismantled the tractor last night to get to the wiring. What a mess!

There are 3 wires from the supply side of the solenoid; A red wire from the Ing. coil, a Brown wire from the "B" terminal of the Generator regulator, and the battery cable from the + side of the battery. The load side of the solenoid goes to the starter. There is a Red/White wire from the key switch to one side the coil on the solenoid and the other side of the coil is a yellow wire running to a light switch???.
There is also another Red wire from the Ing. coil to the ballast resistor and from the Ballast Resistor, a Brown and Red wire to the key switch.

As a side note the wiring on top of the gas tank must have been real hot at one time because most of the wires have been spliced with green wires. The Brown/Red wire is bare where it goes over the gas tank right now so I will need to replace that wire. There are also some wires that can be eliminated as they are spliced in making one long wire that could be half the length. A rewire is definitly going to follow getting the key switch to shut the tractor off.

Any help and advise is welcome and I appreciate it all!

Here is a drawing of what I found lastnight.

This post was edited by JWinnett at 05:43:09 09/20/12.

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