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Farmall & IHC Tractors Discussion Forum
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Farmall 756 ignition key switch question

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Mike Persson

06-02-2005 06:08:43




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I recently bought a 756 gas tractor. Someone in the past has put a cab on it and changed the wiring all around. The inside of the cab is like a spider web of wires so I've been neatening things up. But it looks like everything goes through the ignition switch - lights, wiper, fan, radio, etc. I have a diagram of the original system, although it's not a schematic, and there are no relays and there's no way to tell just what went through the ignition switch. Is this ignition switch made to handle all that current or should I figure out how to cobble up some relays?

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K.B.-826

06-02-2005 16:42:35




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 Re: Farmall 756 ignition key switch question in reply to Mike Persson, 06-02-2005 06:08:43  
Sounds dangerous. The only things that went through the key switch from the factory were the idiot lights, the fuel guage, and the igintion. Your Case-IH dealer should be more than happy to make you a photocopy of the wiring diagram. Like tractor vet said, $20 spent on on relays and breakers is well worth it. Get the cab on it's own relay controlled by the key switch and then add a few breakers here and there. Make sure your relay is good for at least 30 amps.

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the tractor vet

06-02-2005 07:17:45




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 Re: Farmall 756 ignition key switch question in reply to Mike Persson, 06-02-2005 06:08:43  
NO. The wireing on the older farmalls leaves alot to be desired . Just like tryen to add more lights on the old system you are just asken for trouble . But if you just set down and think things out and add a couple CV relays and self resetting breakers then one can add a few more lites and accesoryes and if done correctly it will look factory and you don"t have to replace the lite switch every couple monthes and have fuses blowen all the time . On the 06"s and thru 66 seires i mak up a bracket that mounts up under the sheetmetal by the T/A lever and mount the a couple twenty amp breakers and a couple C V relays for the extra lites and any cab acc. then make up a wire harness in factory color code that plugs in to the factory harness no cutting and splicing no butt connectors it is time well spent. And if something does happen then you can trace the wires by the color .

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