If your car stereo won’t turn off, you could be faced with some pretty annoying consequences. Car stereos don’t use a huge amount of power, but it’s enough to drain your battery overnight, or even within a few hours if your battery is already on its last legs. So how do you fix a car stereo that won’t turn off? Most of the time, it’s due to an electrical problem, so we’ll walk you through the most common causes and how to fix them.
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If your car stereo won’t turn off, follow these steps to eliminate every possible culprit. You should be able to pinpoint the source of the problem and even fix it by following these instructions. If you reach the end and your car stereo still won’t turn off, you may need to seek professional help.
Check your head unit wiring. If you have an aftermarket head unit and your problem has been there since installation, then you are likely dealing with a wiring issue.
Car stereos are designed to have one ground wire and two power wires. One power wire is hot all the time and the other only has power when the engine is running or the ignition switch is in the accessory position.
