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Farmall & IHC Tractors Discussion Forum
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240 wiring

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Rob in Ore

07-02-2006 12:45:52




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I have a new to me International 240. It starts and runs but the ammeter shows oppsite of what it ought to. It is 6V pos ground, the generator checks good at the local NAPA, there is a new regulator and a new battery. The lights have been removed completely, not even the switch is left. I am wondering if I should just re-wire the whole thing from scratch since many of the wires are nicked, taped-up and exposed. I have the diagram from the manual.

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John T

07-02-2006 18:38:43




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 Re: 240 wiring in reply to Rob in Ore, 07-02-2006 12:45:52  
Rob, if the ammeter is wired correct if you turn on the lights or ignition (unless its a mag) when shes not running it ought to swing over to - discharge, but then once running if shes charging swing over to + charge. If it does just the opposite of that swap its leads side to side and it will then register correctly. Normally theres but ONE wire on the ammeters SUPPLY terminal which is to the battery/starter often at the starter switch or solenoid where the big battery cable attaches. Its other LOAD terminal is what feeds loads like lights n ignition (unless its a 4 pole VR with the L terminal) PLUS wires to the BAT terminal on a Voltage Regulator/Cutout Relay. If you wired up a VR in opposite polarity it could harm it so to be safe be sure n re polarize the genny once all is rewired.

If a bunch of wires are bad or frayed I like your idea to re wire the whole thing n be done with it.

John T

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CNKS

07-02-2006 13:34:17




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 Re: 240 wiring in reply to Rob in Ore, 07-02-2006 12:45:52  
Since you have the manual, it shows whether or not you have the ammeter hooked up backwards. If you have not polarized the generator, the manual will explaing that too. It should be polarized as needed, especially after removing and reinstalling. Yes, it looks like you need a new wiring harness.



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Rob in Ore

07-02-2006 15:39:13




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 Re: 240 wiring in reply to CNKS, 07-02-2006 13:34:17  
I've tried to look for markings on the ammeter back I can't see anything. By looking at the number of wires and where they lead to it looks like the meter is wired right.
The shop said they they polarized the regulator and generator. Could I have messed it up by not polarizing again after they were installed? I did polarize it after I noticed this ammeter issue but now I wonder if the damage has been done.
If I replace all of the wiring will 10 gauge be right? The battery I will do in 1 gauge.

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CNKS

07-02-2006 18:46:47




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 Re: 240 wiring in reply to Rob in Ore, 07-02-2006 15:39:13  
I don't know what gauge the wire is, I think most of it is much thinner than 10 gauge. Carter and Gruenwald also sell harnesses, they won't be particulaly cheap. I would repolarize it, it won't hurt anything, I doubt if you have done any damage.



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