First, you must disconnect the negative end of the car battery.

You will potentially be shocked if you mishandle the battery. Make sure the car is off before inspecting the engine and grabbing the negative connector.

Open the hood of your car and locate the battery.

Look for the negative end of your battery. It is usually indicated with a minus sign next to it.

Disconnecting the negative connection prevents you from receiving any electrical shocks while removing the stereo.