If you’re ever driving in a car and want to know if the amplifier in your car is working properly, you can do this test by using a multimeter. To do this test, you will need to connect the multimeter to the power outlet and the amplifier. Then, plug in the other end of the multimeter to the ground wire on the amplifier. Finally, connect the multimeter to your car’s speaker terminals. Now, turn on your car’s engine and wait for it to start up. Once it starts up, use your multimeter to measure how much power is being used by your amplifier. If there is a lot of power being used, then your amplifier may be working properly. If there is not a lot of power being used, then your amplifier may not be working properly and you will need to take it into an authorized dealer for repair or replacement.
