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What is the blue remote wire for on a car stereo?

Author

William Rodriguez

Published Jan 19, 2026

One thing to note, most head unit wiring harnesses also have a solid blue wire. This wire is typically for power antenna or factory amplifier turn on, do not get this wire confused with the remote turn on wire with the blue/white stripe.

What does the remote wire go to?

The turn-on wire (also called the remote wire) is located behind the stereo. On aftermarket stereos, it's usually a blue and white wire. The remote wire will "tell" your amplifier to turn on whenever the stereo is powered up (usually, whenever the vehicle is turned on).

Can you use any wire for remote wire?

Just run the remote wire off your other amp. any copper wire will work it doesnt matter how old or new it is. just find some old copper wire and use it.

How do I connect my remote wire to my stereo?

Wiring the remote turn on wire with an aftermarket head unit is pretty straightforward. Simply connect another piece of blue primary wire to the blue wire in the wiring harness and run the primary wire back to the amplifier to terminate in the remote turn on terminal.

Is the power antenna wire the remote wire?

Almost every aftermarket head unit has a remote turn on wire. Some manufacturers call it a power antenna wire. But regardless of the label all it does is output a positive 12 volts when the head unit is turned on.

15 related questions found

What is antenna remote?

Remote antennas are external antennas that are not attached directly to the receiver but are instead connected to the receiver via an antenna cable. This allows rotational antennas, for example, to be positioned at an elevated point ideal for reception.

What size is remote wire for amp?

AudioControl recommends 18 gauge wire for our car audio products, such as our line converters, EQs, crossovers and DSP processors.

Can I use remote wire for speakers?

It doesn't matter what kind of wire you use for a remote wire. Any copper wire will work when used as a remote wire. Since most speaker wires are made of copper metal, they can be used for remote wiring. Remote wiring is mostly found in vehicles.

What gauge is a remote wire?

100-FEET (30.5m) [ BLACK 14 GAUGE PRIMARY OR REMOTE WIRE ] - The lower the gauge number, the thicker the wire. Thicker wire presents less resistance to current flow.

Can I use speaker wire for epicenter?

Unlike speaker cables, which can be routed directly next to existing car wiring, we also recommend that you route line level (coaxial) wiring between the head end unit and the Epicenter away from car wiring, amplifier power supply cables or speaker wires if possible.

Do RCA cables go to input or output on amp?

Your amplifier gets its input signals from the receiver's output typically via RCA cables. RCA cables come in stereo pairs, in various lengths. When running new speaker wires from your amplifier's output to the speakers, any size wire from 18- to 14-gauge will work fine.

What are the RCA jacks on the back of my car stereo for?

RCA jack (line-level) connections

RCA cables (line-level connections) are the preferred way to connect a signal to your amp if you have that option. RCA jacks on the rear of a Pioneer head unit. This is the ideal way to connect your amplifier's signal inputs, if available.

What is the difference between speaker wire and power wire?

The only difference is that speaker wire typically has clear outer insulation, while electrical wire might be black, brown, white or some other color. That similarity isn't an illusion; the wires are very much alike and can be used interchangeably in many circumstances.

Can you use speaker wire for 12v lights?

You can definitely use speaker wire for 12v power. The only factor to consider is the wire gauge. Various gauges will allow for higher or lower amperage, which, when multiplied with volts (in our case 12v), will give you the electrical load (watts) that the electrical device or appliance should be.

Do speaker cables carry power?

Speaker wires carry whatever level of current comes out of the amplifier. A typical 100-watt amplifier powering an 8-ohm speaker would produce about 4 amps at 30 volts, which most people would not feel.

What is the remote wire made of?

Made from 100% Oxygen Free Copper (OFC) Copper.

What is the 12V accessory wire on a car stereo?

The 12V accessory wire is one of the three power wires a car stereo utilizes. It is red in color and helps trigger the stereo to come on. However, for this wire to turn on the stereo, your ignition key must be in the accessory position.

What is a 18 gauge wire?

AWG stands for American wire gauge. It relates to the diameter of the wire. The more current capacity it can carry, the lower the AWG. A thicker 16AWG can carry 13 Amps, but a thinner 18AWG can only carry 10 Amps.

Do I connect the blue wire to the black wire?

The black and blue wires need to be connected. You will be able to control your fan and lights with a single switch. You should twist the black and blue wires the same way you did the previous wires.

What is blue wire?

Blue wire generally refers to a type of wire or cable that is added to a hardware product at a factory in order to resolve design problems. Blue wires are also known as bodge wires in British English.