Recently the heated seats and heated rear screen have stopped working and the blowers don't kick in on the front demist. All the controls light up. All fuses appeared fine but I have swapped with known good ones just in case. There is a very good chance that this coincides with me fitting a new stereo so my first port of call is to check the wiring to the back of the control unit in the dash. The only thing that confuses me is that the drivers side heated mirror doesnt work, which I would expect, but the passengers side heated mirror does work?? Could there be something else wrong? Surely the mirrors are on the same circuit as the rear screen?