Just installed an aftermarket stereo on my girlfriends polo. It did have a stereo in when we bought the car but it was old cd player model; it did work most of the time but it was a little temperamental sometimes not switching on, so i went and picked up a newer mp3 stereo replacement.
After installing it now wont power up at all. I have used the correct iso connectors and i have also checked all the connectors with a multimeter including the ground, live and ignition live are all connected properly to the wiring connector. I have connected the 3 wires manually bypassing the iso connector to the stereo wiring but still no luck. I have tried 3 different known working stereos and nothing worked. The 15 amp fuse in the box is good and not broken.
Just stuck for ideas now on really, help would be much appreciated...Thanks