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Re: Ignition switch for 300 farmall
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Posted by Bob M on November 06, 2001 at 18:14:00 from (66.66.72.246):
In Reply to: Ignition switch for 300 farmall posted by Paul on November 06, 2001 at 17:42:04:
Paul - I've never messed with Farmall with key ignitions so I have no diagrams to share. However your problem shouldn't be too hard to figure out. The 4 terminals on your ignition switch should be labelled and connected as follows:
BAT - 12 volt feed to the switch (usually from the ammeter)
IGN - connect to the coil
STR - connect to the starter solenoid
ACC - accessory - no connection, unless your tractor has accessory loads like electric gages If the switch terminals are not labeled, it's easy to figure what each one is. Use an ohmmeter, continuity meter or test light to test terminal continuity. You should get the following continuity readings with key in the following positions.
Key ACC - continuity between BAT - ACC
Key OFF - no continuity, all terminals
Key ON - continuity between BAT - IGN, and BAT - ACC
Key START - Continuity between BAT - IGN, and BAT - STR Note: If you used a Delco 3-wire alternator in your conversion, you can use the ACC terminal to feed the alternator warning light circuit. Hope this helps...
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