Yellow wire 12 volts constant. Red wire 12 volts ignition/accessory.
What color wire is the power wire on radio?
|Blue||Power / Antenna||+|
|Blue / White Stripe||Power / Amplifier||+|
What color is the memory wire on a radio?
Check for the 12V Wire
When you find one that shows approximately 12V, you have found the constant 12V wire, also known as the memory wire. It’s yellow in most aftermarket head units.
Is yellow wire constant power?
Yellow wire labeled “battery” should have constant 12 volts, whether the car is on or off.