Car Stereos: Head unit playing wut no music coming out, sony xplode, toyota corona

Question
Hey i have just installed a Sony xplode cdx-gt150 head deck in my 1990 Toyota Corona and it plays a cd but no music is coming out of the speakers. I tested it after i wired it up and it worked fine then as soon as i screwed the bracket on it on and fitted it in the car and tested again only a small buzzing sound comes out of the speakers while CD and radio plays, i took it out and checked the wiring and it looked fine. When i change volume/setting etc the beep still goes each speaker but no music??? Is there a setting ive messed up to stop sound working??

Answer
Hi Chris.

Does your car have a factory premioum sound?.
i dont believe that radio has a setting like that, sound more like a speaker its messed up and its causing the outputs on the radio to short out, i would probably start by checking the speakers one by one, and if u think it can be a setting on the radio try pushing the reset button on it.

Hope this helps.

Ed.