Hi once again folks, i had an aftermarket JVC in the car when it was bought. However this neither had an aux cable which is my lifeline for listening to Spotify through my phone. However today i bought a Pure Highway H270SB which is equipped with both bluetooth and an aux port. I took the JVC out and plugged in the cables to the new stereo which were like for like but i can't get the thing to power on. Luckily my friend had a brand new stereo which hadn't been opened which also wouldn't power on. Strange as it may seem i put the cables back into the JVC and hey presto that powered on no problem. Now having already got an aftermarket stereo fitted i wouldn't think i would need a 'live feed' wired which is what has been coming up through recent google searches. If anyone has a solution for this it would be greatly appreciated.