Yellow wire 12 volts constant. Red wire 12 volts ignition/accessory. Black wire ground.
Is yellow wire constant power?
Yellow wire labeled “battery” should have constant 12 volts, whether the car is on or off.
What color wire is the power wire on radio?
|Blue||Power / Antenna||+|
|Blue / White Stripe||Power / Amplifier||+|
What color is the constant 12V wire?
Constant (yellow), also called BAT or Battery, provides permanent +12V power from battery. This allows the radio to retain settings (for example stored radio stations) when the ignition is switched off.