How To Test Car Amp With Multimeter. Car batteries usually measure at 126 volts when the car is turned off and between 137 and 147 volts when the engine is running. The first thing to do is to set the multimeter to test for voltage.
For this use the amplifier at VDC mode set the wires check the amp fuse along with output and check the voltage. 3 Using the probes measure the ac voltage from the centre pin and. If your amplifier comes with a separate power source you will test it in the same way.
If you are using a manual ranging multimeter set the ranger a value higher than 12v.
Firstly check your multimeter unit if it is working properly or not. How To Test The Cold Cranking Amps of a Car Battery with a Multimeter. If your amplifier comes with a separate power source you will test it in the same way. Set the multimeter probes connected to the battery terminals and switch on the ignition.
