Skip to main content

How to Change a Car Amplifier Fuse

Learn how to change a car amplifier fuse in this Howcast car stereo video with expert Movin' On.


Hi my name is Movin On, and I've been working in the field of car audio and mobile electronics for 8 over years. I've installed everything from navigation systems to full car stereo systems, remote starters, alarms, and beyond. To learn more, visit our web site at

Most car amplifiers are powered by a wire that hooks up to the car's battery and runs in the back of the car. This wire is protected by a fuse that is usually 6 -10 inches from the car battery. if your car's stereo system stops working, the first thing you should check is this fuse. To check the fuse, simply look at it, and check to see that the little connection in the middle is blown. By looking at it you should be able to tell this. It should be a little bit black in color and the connection should be broken. By breaking the connection, it is pretty much protecting the circuit by disabling. To change the fuse, you're going to have to remove the clear plastic cover and you're going to have to loosen the fuse. Most of these fuses can be changed by hand but increasingly these fuses are secured with Allen keys. Take an Allen key and loosen the fuse and remove it. Then you should check to see why the fuse blew. You may also want to take a multimeter and check the car side of the fuse for a ground. If it is grounded out and you put a fuse back in, it's just going to pop out again. Replacing a fuse with a higher amp fuse to avoid the fuse blowing again, is bad practice. A 30 amp fuse is meant to protect a 30 amp circuit. If you put a 50 amp fuse in, now it's going to take 50 amps to blow that circuit, so most likely devices are going to burn out before the fuse blows. Once you properly inserted a new fuse, you can tighten the Allen keys back up, put the cover back on and test your system again. If the fuse pops again, then that's going to warrant some more troubleshooting, if not you're good to go.

Popular Categories