Where to Connect Remote Wire for Amp

The most common question we see on the internet is, how do I connect the remote wire for the amp? Are you also the one looking for this answer? If you are among them,  read this article! Here we cover all the necessary points, where to mount and wire the amp. And we’ll guide you through the installation process step by step. And also, share a few tips and tricks that might help you.

But, before proceeding, did you know about,

Describe Remote Wire?

Behind the head, the unit is a blue cable with a white stripe used for remote turn-on. As vital as wiring the power and ground wires, understand how and where to connect an amp’s remote wire appropriately.

This is because if it isn’t connected correctly, even if your amp has good power and ground connections, it won’t come on, or it might consume power repeatedly until the battery is fully depleted.

Therefore, you are in the ideal location if you’re confused about where to connect the remote wire for your amplifier. We’ve got you covered with advice and concepts that will inform you of everything you need to know.

Working On Remote Turn-On Wire

The remote turn-on wire outputs a positive 12 volts when the head unit is turned on.

When the ignition is ON, the remote turn-on wire receives a 12v DC signal from the factory electrical system. This signal is transferred through the remote turn-on wire to the amplifier turn-on circuit; when the amplifier senses this voltage, it turns the amplifier on. Likewise, when there’s no voltage in the wire (meaning the ignition of the vehicle is turned off), the amp shuts off.

Some new version amps don’t require a remote turn-on wire because they’re featured with auto-turn-on technology, which can sense the signal from the head unit through the RCA or speaker level inputs. However, if your amp doesn’t have that feature, you must hook up the remote turn-on wire.

What Accessories & Wiring do I Need?

Car amps don’t come with any wiring kit included. It would help if you supplied the amp’s power and ground wiring, an inline fuse, a remote turn-on wire, RCA cables, and speaker wires.

Where Should I Connect My Amp?

These recommendations may assist you in deciding where to place your amplifier. Your installation will go more smoothly if you choose a creative mounting location:

  • Make sure the amp is safe by adhering to the mounting instructions. Unsecure apps risk escaping during an accident and hurting someone as they fly through the car.
  • The amp should be at least three feet away from the stereo to prevent noise from the vehicle’s electrical system. The stereo’s AM/FM reception may also be hampered by the amp.
  • Avoid bolting your amp directly to the metal of your car’s chassis; this will cause noise issues. You might install rubber grommets around the mounting screws to isolate the case. Alternately, you might attach the amplifier to a piece of wood or plastic and connect.
  • An amp produces damaging heat during operation, which its heatsink absorbs and radiates away from the circuitry. The amp needs some air space around it to stay as cool. Never mount an amp upside down, as dissipated heat will radiate back into the amp.
  • Make sure you have enough room to connect the wiring and adjust the controls.

Locations to install an amp:

  • Use short wires and patch cords on the firewall’s passenger side. You won’t need to get into the trunk or remove a seat. But keep in mind that only modest amps will fit here. This places some well-known sources of noise close to your amplifier.
  • There are in the hatch or trunk: Large amps have plenty of areas. Close to the back speakers. The amp controls are easily accessible. However, you give up some cargo room and require longer wiring and patch connections.
  • Shorter patch cables and signal cables, less susceptible to noise and signal deterioration, can be used closer to the receiver. It will be simpler to run wire to the front speakers because it is closer to them, lost no cargo space. You might need to take away the

Ways to Connect Remote Wire for Amp

Here are some ways to get the job done professionally.

1. Connect up to the ACC wire

A car typically has three circuits: ignition, accessory, and always-on. The latter is perpetually active. The clock, customizable settings, preset stations, and various other configuration data are all stored in your car using this circuit.

On the other side, the ignition circuit is on when the key is switched on (in run or start position). These circuits, which power the engine electronics and are inactive when the accessory lever is in the on position, do not trip when the engine starts.

The auxiliary circuit controls the radio, wipers, and the majority of aftermarket accessories. It turns on only when the key is in the accessory or run position. However, it frequently shuts off as the engine starts. This is what you want to connect your amp’s remote wire to.

Hooking up your amp’s remote turn-on wire to the accessory wire is the same concept as tapping into the fuse box.

There are several ways to tap into an electrical wire. However, the simplest way is to purchase a quick tap connector, put the wire you want to tap into it and the new wire and then clamp it down. This method doesn’t require any cutting or splicing.

If you’re picking up this technique, you may want to use a toggle switch somewhere in line with this new remote wire to turn the amp off when the radio is off while the car is on.

Usually, you would leave it on so that it turns on when the head unit is on. But if you wanted to turn the amplifier off, you could flip the switch off, stopping the flow of 12 volts to the amplifier’s remote turn-on terminal.

Another great workaround involving the acc wire is to use a relay, and the accessory lead that your radio is wired to turns it on and off with the key. Your amplifier will now turn on and off automatically with the key.

Using a relay seems a bit too much if you’re dealing with one amplifier. However, it’s handy when dealing with multiple amplifiers connected to one source.

2. Tapping into the fuse box

Utilizing unoccupied fuse box slots is the best way to access your car’s electrical system. But in this instance, we must employ a fused slot in the fuse box, which activates when the ignition is turned on.

In particular, tapping into the fuse box may initially appear a bit overwhelming if you’re a relative audio novice. Even so, you may quickly do it with the right installation tools.

Locate the fuse box first, then. Look at the owner’s manual of your car if you are unsure of its location. Next, examine your fuse diagram to attempt to choose where you want to start.

You can connect it to nearly any fused output terminal if your remote wire only receives power while the engine is turned on.

You must start probing and use a voltmeter to check for that. Then, connect the black test lead to a reliable ground, set your voltmeter to DC (the solid line with dots blows it), and insert the pointed end of the red test lead into each hole in turn. The fuse turns on and off with the car if the voltmeter registers 12 volts when the ignition is turned on and nothing when it is off. Can therefore connect the remote turn-on cable to that fuse.

To save you from all the hassle and headache, spend a few bucks on a mini fuse tap pigtail and find the switched accessory fuse location, connect the remote wire to it, and plug it in; it’s straightforward.

3. Tap into any switched 12v power source

Hooking up the remote turn-on wire to the Accessory wire isn’t the only way to get you an amp to turn on and off automatically. You can use almost any 12v switched source. If your amplifier, for example, is mounted in the trunk, you can connect its turn-on wire to the fuel pump wire.

4. Substitute power antenna wire

Replace the head unit’s remote turn-on cable with a power antenna. However, you must ensure that the head unit activates in all modes (Aux, radio, CD, SD card, etc.) when turned on.

Many automobiles typically have fixed antennas that aren’t typically activated when the head unit or the key is turned on.

However, you would only receive output from the amplifier when you turned the radio on if you connected the remote terminal of your amplifier to the power antenna line. When you switch to CD, SD card, or any other audio source, the amplifier will not work because the head unit turns off the power antenna wire when the radio section is inactive.

That said, must only substitute the power antenna wire for a remote turn-on wire if it comes alive in all modes.

5. Turn-on module Usage

A turn-on module is a small gadget that sends the amplifier a turn-on signal. Because it can drive several amps, it is very affordable. Most turn-on modules may output a remote turn signal from any power source greater than +0.8V. This implies using a speaker wire to activate your remote control.

When the turn-on module detects a voltage on the speaker wire, it will transmit a +12 volt signal through the remote wire to the amp’s turn-on circuit. 


As you can see, there’re several ways to connect a remote wire to the amp. Connecting the remote wire for the amp will only turn on when the car is turned on and turn off with the car key. That way, it won’t drain your car battery when the engine is turned off.

I Hope the methods explained benefit you. Now you know how and where to connect the remote wire for an amp. Still facing any issue, ask for professional help. It will save you time. 

Also, check out our related article; it might help you!

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