An car amplifier requires 12 volts from the car battery to operate. In order to avoid an dead car battery in the morning, it should be setup correctly with the vehicles ignition system. There are three important terminals associated with powering an car amplifier. Red power constant 12 volts, black ground which connects to the cars chassis and also an turn on remote wire, usually thin blue wire is used. The remote turn on wire is most likely connected to an constant 12 volt feed. This is the correct reason when car amplifier stays on all night.
On an aftermarket stereo, this should be connected only to the blue, or blue with stripe wire. If you're not using an aftermarket radio, use an multimeter to find a source in the fuse box that is switched. Place the red metal prong of the tester onto the pins exposed on the top of the fuse, the other negative black prong touch it towards an metal screw somewhere inside the fuse box you will find one. Turn on the ignition and test which fuse reads 12 volts. Turn the key off? Does the voltage drop back to zero? If so, you have found the correct ignition switched fuse. You will need to create an separate circuit to add onto the original fuse location. This can easily be accomplished by using an fuse tap. Remove the original fuse from the fuse slot you are using insert this into the first fuse slot on the fuse tap. The second fuse slot right next to it on the fuse tap, add an 5 amp fuse. This will provide safety in case an short circuit may occur, which in some rear cases can happen.
You will now need to connect an blue remote wire and feed it down the side of the vehicle and connect the other end into the remote turn on terminal found on the car amplifier. The wire needs to be placed into the hole and screw tightened with the correct size screwdriver. Now when you start the vehicle, the car amp power light will come on and when the ignition is turned off an the key removed the car amplifier will turn off. I hope this car audio article on our website has helped you stops your car amplifier draining your car battery problem. Feel free to check out our other posts about subwoofers and speakers.
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