You need to buy an amp adapter. SCOSCHE OEA4 4-Channel Adjustable Factory Amplifier Int. 23 bucks on ebay. You most likely have a factory amp in your car and the head unit's speaker output wires are already amped. the factory amp can't understand the audio signal.
I had the same problem when I installed in-dash unit. Check your "power antenna" lead...I think it's purple. Even if you don't have a power antenna, it still needs to be connected (no idea why).
Answers & Comments
You need to buy an amp adapter. SCOSCHE OEA4 4-Channel Adjustable Factory Amplifier Int. 23 bucks on ebay. You most likely have a factory amp in your car and the head unit's speaker output wires are already amped. the factory amp can't understand the audio signal.
Have problem with xovision do not know to connet power wire have black to groung ,red to power , yello to permaneht . what is that
I had the same problem when I installed in-dash unit. Check your "power antenna" lead...I think it's purple. Even if you don't have a power antenna, it still needs to be connected (no idea why).