Posted by John T on August 12, 2014 at 12:50:37 from (216.249.72.121):
In Reply to: Delco 10si hookup help. posted by PretendFarmer on August 12, 2014 at 11:06:50:
In order to prevent the tractor from running on even if you turn off the ignition, in the "excitation circuit" from a hot when IGN on source (Ign switches IGN output or coil input) to the alternators small No 1 side terminal, some use a diode, but I prefer EITHER a 10 ohm 5 watt resistor or an Idiot Light (as Bob M noted) because it provides some degree of current limiting, its not polarity sensitive like a diode is, and is cheap, easy and simpler to wire.
The small No 2 terminal is the "voltage sense" and I usually just jump wire that to the big main alternator output stud.
The big main output I use No 10 wire up to an ammeter if it has one or else to the hot + ungrounded battery post, often via where the big battery cable attaches to a starter switch or solenoid input.
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