Knowledge is Key
Anonymous posted an answer for this Pioneer DEH-P2900MP CD Receiver /AM/FM/MP3/ CD Player:
"Switch the ignition and battery wires."
Anonymous posted an answer for this Car Audio & Video:
"Your battery and ignition wires are backwards. Try switching them and see if that works."
Anonymous posted an answer for this Car Audio & Video:
"Is it all factory equipment? If so you need to go to your local gm dealer and have them..."
Anonymous posted an answer for this Car Audio & Video:
"Your radio probably has a sub on and off function on it that was reset when it lost power...."
Anonymous posted an answer for this Kenwood KDC-PSW9524 CD Player:
"Typically if you enter the wrong code several times the unit will lock up. To unlock it..."
Anonymous posted an answer for this Alpine Car Audio & Video:
"If the radio is factory then you need to remove it to access the serial number. With that..."
Car Audio & Video 6 answers