Hi there... Got a problem with my SONY head unit! (Fitted in a VW Golf MK3) When I first installed it, it worked fine. But when I turned my engine off everything reset, lost all settings etc... Anyway, swapped red and yellow bullet connectors over and bingo! Today I decided to wire up my 6x9's which have been lying around the house for a while. I cut the correct wires, joined them with block connecters and they were working perfectly... So I went to slide my head unit back in, and the power kept flicking on and off, then I heard some funny noises in my dash board. Head unit no longer works... Had a fiddle around, I put the yellow and red wires together (on the metal) and the power came on. So I taped them together thinking this would be ok. Took key out of ignition and radio is still playing!!! Help me?!?!? Checked fuses, they are fine. Why wont my head unit work after wiring my 6x9's up?