- You will need to check the yellow wire. Be sure that the yellow is receiving 12VDC when the vehicle is OFF. If it is losing voltage, then the head unit will lose memory. - The Clock, Audio Settings, and Radio Presets will all be lost. To correct this problem, you will need to relocate the yellow wire to a constant 12VDC source. - The ACC line(Red wire) and the B+ line(Yellow wire) are reversed during installation.