How Check Alternator Charging. Set the knob on the multimeter to the DC AMPS setting to perform a test of the direct current emitting from the mowers alternator. You can disconnect the battery while the car is running to check an alternator.

Toyota also recommends inspecting the condition of the drive belt. A bench test is the best way to identify problems with your alternator. You can disconnect the battery while the car is running to check an alternator.
If you are noticing any of the above signs of a bad car battery vs.
Voltage should be around 12 to 13V. If the terminator is too old the contacts will rust. Toyota also recommends inspecting the condition of the drive belt. You should also check the ground connection of the battery.
