Android Radio Wiring Diagram

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Connect an aftermarket Android car radio to your vehicle's wiring harness using ISO 10487 connectors, with colour codes, fusing, antenna, and speaker wiring explained.

Aftermarket Android car radios (also called Android head units or Android Auto-capable double-DIN units) connect to the vehicle's electrical system and speaker network through a standardised connector system defined by ISO 10487. This standard defines two multipin connectors — designated ISO A (power and auxiliary functions) and ISO B (audio/speaker connections) — that have been adopted by most European and many Asian vehicle manufacturers since the 1980s.

The ISO A connector (the power connector) carries the following principal circuits: a permanent 12 V supply (memory/battery keep-alive, typically Yellow), an ignition-switched 12 V supply (ACC or ignition, typically Red), a ground/earth return (typically Black), an illumination input that dims the display when headlights are on (typically Orange or Orange/White), and a muting or telephone control input (typically Blue/White).

A dedicated Blue or Blue/White wire — often labelled 'Remote' or 'Amp Remote' on the radio harness — is the power antenna or amplifier remote turn-on signal. When the radio is active, this wire outputs 12 V to trigger an external amplifier's turn-on input or raise an electric antenna mast. It must not be confused with the vehicle's antenna supply or the ISO illumination wire.

The ISO B connector carries four speaker channels: front left (typically White/White-Black), front right (typically Grey/Grey-Black), rear left (typically Green/Green-Black), and rear right (typically Purple/Purple-Black). Each channel uses a positive and a negative wire. Critically, aftermarket radio speaker outputs are floating — they must not be connected to vehicle chassis ground on the negative terminal. Many older vehicles ran a 'common ground' speaker system where the negative speaker terminal connected to chassis; this is incompatible with modern floating-output radios and will damage the radio's amplifier stage.

For vehicles whose factory connectors do not match ISO 10487 (including many Asian brands and premium European vehicles with proprietary CAN-bus integrated audio), a vehicle-specific wiring adapter harness is required. These adapters translate the factory connector pinout to ISO standard connections and, in CAN-bus integrated systems, include a CAN-bus interface module that decodes steering wheel controls and retains retained vehicle functions.

This diagram and description is a generic reference based on the ISO 10487 standard. Always verify connections against your specific vehicle's wiring diagram and the head unit's installation manual before connecting. Radio and vehicle harness wire colours may deviate from ISO defaults.

How to wire android radio wiring diagram

Gather the vehicle's wiring diagram and radio installation manual Before cutting or connecting any wires, obtain the installation manual for your specific Android radio head unit and the factory wiring diagram for your vehicle's audio system. Colour codes on the radio harness are ISO-based but the vehicle's wires may use different colours. Never assume — verify with a multimeter.
Disconnect the vehicle battery negative terminal Always disconnect the vehicle battery negative (−) terminal before working on the audio system. Modern vehicles have airbag systems, CAN-bus modules, and memory-sensitive ECUs that can be damaged or triggered by accidental short circuits during radio installation.
Identify the power connections with a multimeter Using a multimeter set to DC voltage, reconnect the battery temporarily and identify three circuits at the factory radio connector: (1) a wire that reads 12 V with ignition OFF — this is the constant supply for the radio's Yellow wire; (2) a wire that reads 12 V only with ignition ON/ACC — this is the switched supply for the radio's Red wire; (3) a wire that reads 0 V in all conditions — this is the ground for the radio's Black wire. Mark them before disconnecting the battery again.
Connect the power harness Connect the radio's Yellow wire to the constant 12 V supply, Red wire to the ignition-switched 12 V supply, and Black wire to ground. If using a vehicle-specific adapter harness, these connections are pre-mapped. Use either the adapter harness's ISO connector or, where direct connection is required, use crimped connections with heat-shrink insulation — never bare twisted connections secured with tape only.
Connect the speaker wires Match each speaker channel wire pair (front left +/−, front right +/−, rear left +/−, rear right +/−) from the radio harness to the corresponding factory speaker wires. Keep positive to positive and negative to negative for each pair. Do not connect any speaker negative to vehicle chassis ground. If the vehicle had a common-ground speaker system, install series capacitors or use a head-unit with a ground-reference output mode as specified in the installation manual.
Connect the antenna and remote wires Connect the radio's antenna IEC (DIN) or ISO coaxial plug to the vehicle's antenna cable. If an electric antenna or signal booster is present, connect the Blue remote wire to the booster's 12 V control input — this energises the booster only when the radio is active. If fitting an external amplifier, connect the Blue/White remote wire to the amplifier's remote input terminal.
Test before final installation and reinstall battery Reconnect the vehicle battery negative terminal. Power on the radio with the ignition on. Verify audio plays through all four speaker channels, the display dims correctly with headlights on, and the clock retains time after the ignition is cycled off and back on. Verify DAB or FM reception if antenna connections are made. Resolve any faults before securing the head unit in the dash.

Specifications

ISO power connector (ISO A)	ISO 10487 Part A: 8-pin connector, power and auxiliary functions
ISO speaker connector (ISO B)	ISO 10487 Part B: 8-pin connector, 4-channel speaker outputs
Constant supply (Yellow) voltage	12 V DC nominal, permanent (not switched)
Switched supply (Red) voltage	12 V DC, ignition ACC or ON position only
Remote/amplifier output (Blue)	12 V DC output, active when radio powered on
Speaker impedance (typical)	4 Ω nominal (most factory and aftermarket speakers)
Standard antenna connector (most head units)	ISO/IEC 60169-2 (DIN) male plug, 50 Ω
Head unit form factor (standard)	Double-DIN: 180 mm wide × 100 mm tall

Safety warnings

Always disconnect the vehicle battery negative terminal before beginning any radio installation. Modern vehicles contain airbag squib circuits, CAN-bus modules, and volatile ECU memory that can be damaged or unintentionally triggered by short circuits during installation.
Never connect the speaker negative wires to vehicle chassis ground. Aftermarket radio amplifier outputs are floating; grounding the negative speaker terminal creates a direct short on the amplifier output and causes immediate, irreversible damage to the radio.
If the radio requires a constant 12 V supply routed directly from the battery (rather than from a pre-existing fused circuit), install an appropriate inline fuse within 300 mm of the battery connection. An unfused battery connection is a fire hazard.
In vehicles with automatic or factory-integrated amplifiers, disconnecting audio signals without using a proper adapter harness or load-matching resistors can cause fault codes, warning chimes, or damage to the factory amplifier. Use a vehicle-specific adapter.
Android head units with GPS, mobile data, or Wi-Fi functionality should not be operated in a way that distracts the driver while the vehicle is in motion. In most jurisdictions, operating a mobile device or touch screen while driving is a traffic offence.

Tools needed

Digital multimeter
Ratchet crimp tool and insulated crimp connectors
Panel trim removal tools (plastic pry tools to avoid scratching dash)
Torx and Phillips screwdrivers
Heat gun for heat-shrink connections
Wire strippers
Electrical tape or self-amalgamating tape

Common mistakes

Connecting the radio's Yellow (constant 12 V) wire to the ignition-switched ACC supply, causing the radio to lose all settings every time the ignition is turned off.
Connecting the negative speaker wires to vehicle chassis ground, immediately destroying the radio's built-in amplifier.
Confusing the Blue amplifier remote wire with the vehicle's illumination or ACC wire, causing the remote output to be permanently active or to never activate.
Omitting the vehicle-specific adapter harness and cutting the factory connector off the vehicle harness — this is irreversible and destroys the vehicle's retained value and repairability.
Not checking for a CAN-bus integrated audio system before installation, then finding that the vehicle's warning chimes, parking sensors, or factory amplifier no longer function after the radio is connected.
Using twisted-and-taped wire joins instead of proper crimped connectors, which fail within months due to vibration and corrosion in the automotive environment.

Troubleshooting

Radio has no sound from all speakers: Cause: Speaker negative wires incorrectly grounded to chassis, blown internal amplifier, or speaker wires crossed Fix: Immediately disconnect and verify no speaker negative wire touches chassis. Test each speaker channel by measuring impedance at the radio's speaker output pins with the radio disconnected — an internal amplifier short will show very low resistance (near 0 Ω) on the affected channel.
Radio powers on but turns off when the ignition is started: Cause: Yellow (constant 12 V) wire connected to ignition-switched ACC supply instead of constant battery supply Fix: Measure voltage on the Yellow wire with ignition in all positions. It must remain at battery voltage even with ignition off or during engine crank. Re-route the Yellow wire to a correctly identified constant supply.
FM/DAB reception is very poor after installation: Cause: Antenna not fully connected, antenna adapter mismatch, or ground loop between radio and antenna coax screen Fix: Verify the antenna plug seats fully in the radio's antenna socket. Check that the coaxial antenna adapter's outer screen is connected and that the screen does not contact the radio's chassis through the dash mounting hardware, which can create a ground loop affecting reception.
Steering wheel controls do not work after installation: Cause: CAN-bus interface module not fitted, not programmed for the vehicle, or interface wiring incorrect Fix: Verify that a CAN-bus interface module appropriate for the vehicle is installed and correctly wired to both the vehicle's CAN-bus lines and the radio's steering wheel control input. The module may require programming via a smartphone app or PC software to match the vehicle make, model, and year.

Frequently asked questions

What is the difference between the Yellow (battery) and Red (ACC) wires on an Android radio?

The Yellow wire connects to a constant 12 V supply that is never interrupted — it keeps the radio's memory, clock, and settings alive when the ignition is off. The Red wire connects to an ignition-switched supply that is only live when the ignition is in ACC or ON position; this wire powers the radio on and off with the ignition key.

Do I need a vehicle-specific wiring adapter harness?

If your vehicle uses ISO 10487 connectors (common in many European-market vehicles), you may be able to connect directly with correct colour matching. If your vehicle has a proprietary factory connector (common in Japanese-market vehicles, and most premium European brands), you will need a vehicle-specific adapter harness. For CAN-bus integrated audio systems, a CAN-bus interface module is also required to retain steering wheel controls and factory warning chimes.

Why should I not ground the negative speaker wires to the vehicle chassis?

Aftermarket radio amplifier outputs are floating (bridged or BTL topology) — both the positive and negative speaker terminals carry audio signals referenced to a common internal rail, not to ground. Grounding the negative speaker terminal creates a short circuit on the amplifier output, causing immediate damage to the radio's internal amplifier. Only connect speaker wires directly to speaker terminals, never to chassis.

What is the Blue antenna remote wire used for?

The Blue (or Blue/White) remote wire outputs 12 V whenever the radio is active. It is used to trigger an external amplifier's remote input (turning the amp on and off with the radio), raise or lower an electric power antenna, or enable an antenna booster. It must not be confused with the antenna signal coaxial connection, which is a separate RF coaxial plug.

My Android radio restarts or loses settings when I start the engine — what is wrong?

This indicates the radio's Yellow (memory/constant 12 V) wire is connected to the ignition-switched supply instead of the constant battery supply, or the constant supply is dropping during engine crank due to a weak battery or poor connection. Verify the Yellow wire is connected to a truly constant 12 V source — it should read battery voltage even with the ignition key removed.

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