hi i've jus recently taken out the stereo from my car and found that someone had chop all the wires to the harness on the car side and bodged them to the old stereo. I bought the connector block from halfords and bullet connectors and and rewired it now I dont get an sound from the new stereo. So i took my dads out an tried that and it does the same there's power going in on both live and switch live, the earth is fine. But the headunit display lights up and it all works except of course the sound.

CAN ANYONE HELP! Its driving me up the wall lol!!!

speaker wires may be on backwards