Where To Connect Remote Wire For Amp? 4 Best Wiring Options

The remote harness assembly connects all the parts, so they have an easy way to communicate. However, not everyone knows the approriate place to connect the remote wire for the amplifier effectively.

There are five wiring options you can consider depending on convenience:

  1. Tap it on the car fuse box
  2. Connect it to the accessory lead
  3. Attach to 12 voltage switched leads (speaker wire, fuel pump cable)
  4. Substitute power antenna wire

Let’s scroll down to discover detailed information about this topic!

How To Find Remote Wire In Car Stereo?

Where To Connect Remote Wire For Amp - Standard wiring colors

The remote wire (also known as the turn-on one) is the blue and white wire installed after the aftermarket stereos. When the amplifier turns on, it receives 12 volts from the receiver. For factory amps, the color might be different.

Besides, you need to understand the cables’ standard color code to follow the wiring steps more easily. Some common colors corresponding to its function are:

  • Yellow: constant 12-volt power source
  • Red: 12 volts switched accessory power supply
  • Black: ground wire
  • Blue: Power antenna wire, the receiver delivers 12-volt when the FM is on
  • Blue wire with white stripes: remote cable
  • Orange color with white stripe: dimmer, draw up to 12 volts from the car with an inside light dimmer control.

Where Should Remote Wire For Amp Be Connected

The general rule here is that you must ensure the power going through is within 12 volts, as this is the ideal amount to connect the remote lead.

Connect It To The Fuse Box

Car fuse box

The fuse box is the best car’s electrical system for remote wiring. Usually, every manual when you buy a car has instructions on the location of this part.

However, if you still can’t find the fuse box, double-check the location near the engine or under the hood and the location near the driver’s seat. This is the location that set the two fuse boxes of the car.

Next, you should determine where you want to connect the fuse box on the fuse diagram. Any fused output terminal can connect as long as the car is always on when it powers up.

There are two ways to help you locate it.

You can take a voltmeter, turn it to DC, and connect the black test lead to the ground. Insert the sharpened point of the red test leads into one hole at a time.

If the ignition is on with 12 volts shown and nothing when it is off, it means that the on/off state of the fuse box is compatible with the car.

Second, you can buy a mini fuse tap pigtail. This will be simpler, and you do not need to do complicated steps if you do not have a voltmeter at home.

Attach it to the ACC wire

Accessory cable is in red color

The ACC wire is a 12-volt red-colored accessory cable connected from the car stereo to the ignition switched accessory fuse location.

The principle of operation here is that once you turn on the ignition, the ACC wire will activate and help turn on the stereo. Conversely, if you take the key off, this lead will also lose power, and the stereo will automatically turn off.

If you only need to connect to one car amplifier on the head unit, the easiest way is to use a quick tap connector and tap your desired one to the new lead.

However, dealing with more than one amp gets more difficult. You can now use a relay with the accessory lead.

Connect To Any 12 Voltage-Switched Power Supply

The turn-on lead can indeed tap all 12v power source switches. The accessory lead is one of those cables.

Alternatively, you can use a fuel pump wire or the orange-colored dimmer. However, it should be noted that the lights dim brighter when this lead is turned on.

Replace With Power Antenna Wire

Power antenna activates a car stereo

The simple solution is to substitute the power antenna with the amp’s remote wire.

The power antenna wire is the blue-colored one on the head unit that will provide a 12 voltage source when it turns on the FM.

Although it may sound similar to the remote cable, there is a slight difference between them. Like the accessory one, the power antenna is activated when the ignition switch is on, automatically turning on the car amplifier. The other one, however, is not automatic.

Despite the functional difference, some manufacturers still call them one. This may explain their color when one is blue and the other is blue with white stripes.

Frequently Asked Questions (FAQs)


What Is Rem On An Amplifier?

Rem is an abbreviation for the remote. On all remote controls, the rem button sends the remote turn signal, which tells the amp to turn on when the stereo is turned on. The same goes for a car audio system.

Will Amp Turn On Without Remote Wire?

There are ways to make the amplifier turn on without the turn-on lead. Even so, these ways would be more inconvenient than having a lead because it lacks mobility and flexibility. And the truth is, most aftermarket and factory amps have a power antenna and rem lead available.

How To Turn On A Car Amp Without Remote Wire?

You can either set up a high-low adapter with a trigger, connect the remote cable from the ignition switch to your amp, or stab the end of it and a cigarette lighter.

Watch out for this tutorial on how to turn on a car amplifier without a rem cable:

Can I Use Speaker Wire For Remote Turn On?

Yes, you can use a speaker wire to handle 12 volts of electricity. All copper leads are valid for use as a toggle switch, as long as we are made from copper metal.

Do You Need RCA Cables On An Amp?

Besides the turn-on lead, RCA cables, power and ground wires, the speaker ones, and an inline fuse are necessary for a car amplifier.


A remote turn on wire is necessary for a car stereo to work smoothly and conveniently as you don’t have to move too much to turn it on. Knowing how to connect it correctly will help the system create a good flow of signals.

Hope the above article will help you answer related questions. If you have any further questions about automotive and car gear, don’t hesitate to leave your comments or contact us via our website.