Hola, iam Jose Harris, Asalam walekum.
Can You Test An Alternator Without Taking It Out? [Solved]
Simply check the voltage of your battery by touching the multimeter prongs to the terminals with the car shut off. Take note of that number; it should be somewhere in the 12-to-13-volt range, according to Hines. Then, start the car and check the voltage at the battery again while the vehicle is running.21 May 2021
Bad Alternator or Bad Battery, Easy Solved
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How To Perform Simple Test Whether Alternator Or Battery Is Bad Without Using Any Diagnostic Tools
There are many ways to
How to Test an Alternator ( Testing the Voltage Regulator, Diode rectifier and Stator)
This video