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Discussion Forum

Re: 1973 Ford 4400 wiring diagram

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Author  [Modern View]

09-19-2012 08:38:21

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Quoting Removed, click Modern View to seeSince I only have diagrams for 2000,3000,4000 and 4100,4600, etc. AND not for your 4400, "certainty" is a missing factor here. Sure would be nice if owner of 4400 diagram would pop up, but......

Given that, since you replaced the solenoid, you are almost certainly correct in that one of the wires got put back in the wrong place. The 4100 & 4600's used a ballast resistance between the key switch and the ignition coil AND used a terminal on the starter solenoid to bypass that resistance during starting........ I expect that the ign coil bypass wire is now connected to the battery terminal on the solenoid and NOT the start-bypass terminal, as it should be. Probably should be only one wire besides battery cable on that large solenoid terminal.

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09-19-2012 12:47:54

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 Re: 1973 Ford 4400 wiring diagram in reply to JMOR, 09-19-2012 08:38:21  
I'll know more tomorrow but there are for sure 3 wires on that one battery terminal. There is a ballast resistor on my 4400 also. I know one of the wires ends up in a loom but I should be able to tell you which ones go to the ing coil, solenoid coil, starter contacts, and ign switch tomorrow, possibly tonight if I get on a PC at home.

I appreciate your help!

This post was edited by JWinnett at 12:48:17 09/19/12.

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09-20-2012 05:32:21

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 Re: 1973 Ford 4400 wiring diagram in reply to JWinnett, 09-19-2012 12:47:54  
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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