![]() ![]() ![]() Take a look at some of our related articles below. One of the main reasons to upgrade a head unit is to upgrade the audio amplifier. So, youll be using the factory power for your speakers, instead of the power from your new radio. They include connections that directly tie the outputs of your new car stereo into the factory amplifiers inputs. Even if it has adequate power and ground connections, it may continue to draw power until depleting the battery. For instance, in many cars, the electronics in the head unit integrate. Many wiring harnesses can let you keep your vehicles factory amplifier when replacing the stock radio. On a side topic, if the remote turn-on-wire is not fitted correctly, your amp may not switch on when the head unit is turned on. Similarly, if you connect a wire that does not get voltage when the ignition is in the ACCESSORY or ON position to the remote turn-on wire, your amp will not turn on until that wire receives voltage. If you tap into an existing constant voltage line in your car amplifier and link it to the remote turn-on wire, the amplifier will always be on. Similarly, the amps go off when there is no voltage in the wire (indicating that the ignition is turned off). ![]() You will need to find a wiring diagram for your plug type or work out which wires are which. This turn-on signal is transmitted to the car amp turn-on circuit via the remote turn-on wire it turns on when the amplifier remote wire detects this voltage. At the back of your stereo there is most likely one big plug which incorporates all of the inputs and outputs to and from your head unit. Once the ignition is in the accessory or on position, the remote turn-on wire gets a turn-on signal of +12 volts DC from the electrical system. What is the Function of the Remote Turn-On Wire? RELATED How to Test Amp Output with Multimeter ![]()
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