How To Test An Alternator On A Tractor. For the easiest alternator test simply turn on the headlights to your lawn mower or outdoor power equipment. Start your engine and let it reach an idling RPM.
Here are the connections. If you see higher readings chances are the alternator is good. Pretty sure my alternator is dead.
Test the battery voltage with the tractor running you should see 13-15 volts.
If you dont then test the voltage at the alternator. A simple test to check the alternator is by running your truck and then unplugging the positive connection of the battery. Took alternator to repair guy in town and he checked it and said it was fine. Once you start the tractor it should start to climb until it reaches about 14 volts.
