How To Check If Alternator Is Charging. If the alternator is charging and the battery stays above 13 volts then the alternator is working well. How to check your alternator.
Connect a multimeter or voltage meter to test the alternator. The current from the alternator flows through the ammeter. While your car is running disconnect the positive battery cable.
While your car is running disconnect the positive battery cable.
125v is only 12 charged. The serpentine belt could have stretched with age and may not be spinning the alternator pulley effectively leading to a lack of charge. An old test for generators was to disconnect the battery with the motor running. When the battery on your Craftsman riding mower refuses to hold a charge there may be a problem with the alternator rather than the.
