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The purpose of the ammeter is to tell you what is going into/coming out of your battery to help you to monitor it's condition; i.e. state of charge. Hence everything electrical in/on your tractor goes thru it except the high current starting wire from the battery, thru the solenoid, to the starter. The battery goes to one side (+) for a neg ground system, everything else to the other (-), including the gen/alt output. The gen/alt will push the needle to the + side indicating that the battery is charging, while the loads will pull it to the - side indicating that it is discharging. Game plan is for it to be centered or slightly in the + region (after gen replenishes starting power) while you run the tractor. If it stays in the - region while operating; like at night when you are running lights, you will eventually discharge your battery to the point where it won't be able to start your tractor. HTH, Mark
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