How To Check Alternator Amperage Output. There is one thick output cable from the. If the voltage reading is above 145 then the voltage regulator inside of the alternator.
If your multimeter DID NOT register 14 to 145 Volts from start to end and the voltage dropped to 9 Volts DC. Connect the red lead to the appropriate stator output wire. Use a multimeter and set it to read amperes.
Check your cars manual or parts manual to see what your alternators maximum amperage should be.
Open the cars hood and secure it. The reading is near the maximum amperes you made a note of earlier. The amp reading on your meter should be near the maximum output. When you test the output voltage of your alternator always include an amperage output test.
