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Farmall & IHC Tractors Discussion Board

Re: 300u starter switches


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Posted by Janicholson on November 23, 2008 at 07:26:46 from (66.173.50.91):

In Reply to: 300u starter switches posted by Rick Bachman on November 22, 2008 at 11:04:27:

I have a clear image in my head of what you have. The toggle switch has its input wire hot at all times. the two wires leaving are going to be powered from that switch when it is on, and no power will flow when off. The switch is wired correctly. The wire going to the push button momentary contact is correct to supply that switch with power. that switch then is connected to the starter S terminal on the relay on the starter. Again correct. The other wire on the toggle goes to the ignition coil to give it running voltage. It is correct. The toggle switch is bad. Disconnect the coil where the lead comes into it (small probably minus marked terminal) Use a jumper wire to jump across the toggle switch terminals nothing should happen, if it does there are possible shorts in a wire going to the coil. Now test for volts at the disconnected coil wire (it should be battery volts). Push the starter button (it should spin and crank (neutral is a good idea)). Now reconnect the coil and start it! Needs a new Toggle switch, get a water resistant one that handles 20 or so amps. JimN


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