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Farmall Tractors Discussion Board |
Re: Alternator hookup M
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Posted by ltf in nc on August 19, 1999 at 19:11:40 from (206.228.213.165):
In Reply to: Alternator hookup M posted by AgMan on August 19, 1999 at 18:25:50:
AgMan, The small wire coming off the connector on the side of the alternator must be disconnected from the power source when the switch is off and the tractor is not running. This is the source of the exciter voltage and it will drain your battery as you discovered. You can correct this situation by several means. If your ignition switch has an accessory terminal you can connect the wire there. AutoZone sells a replacement switch (generic) for $7 or so. If you use this method it is a good idea to install a fusible link or fuse for circuit protection should the alternator ever have an internal short. A second method is to mount a lamp socket from the accessory terminal on the switch to the exciter wire. This will function as an "idiot" lamp. Use a large size instrument panel bulb for this. Remember, if this bulb burns out the alternator will not charge. Without the accessory terminal switch on a gas tractor it is easy to get the system wired to when you get the switch turned off the tractor continues to run because you get feedback to the coil from the exciter circuit. One wire alternators accomplish this task by using a diode but I have not found them to be reliable and discourge the use. Good luck and post your results.
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