
Problem: Installed An Aftermarket Head Unit and Now It Has No Power Possible Solution: Blue/White wire located on Head Unite wire harness. If your car has any of these systems, check your AMP TURNON signal wire for 12v. Many cars have built in amplifiers that require a 12v signal to be sent in order to turn on the Amplifier, most common being Bose, Infinity, and JBL.Problem: Head Unit Has Power But No Sound Possible Solution: Get behind the lighter and tap into the positive wire and connect it to your RED Accessory/Ignition wire on your aftermarket wire harness.

The easiest way to locate an Accessory/Ignition wire is to find a cigarette lighter that turns on when the car does. Many Jeeps and Chevrolet systems have a data signal wire that carries a very low voltage signal that tells the OEM Head Unit when to turn on, however it is not compatible with aftermarket units.
2007 f150 stereo upgrade install#


Problem: Can’t Find an Accessory/Ignition Power Wire.
