I've been having severe problems whereby certain functions aren't working which all appear to be connected to the yellow plug at the back of my stereo.


The connector is IC20 and after removing my stereo to replace some bulbs in my console and trying to fit a car kit I've discovered that the aerial doesn't go up and down, no screen on my sat nav, no illumination on my stereo and the volume controls on the steering wheel no longer works.


Looking at the diagram all these are connected to this IC20 so I was wondering if anyone has any ideas. I've already tried another stereo but made no difference.


Regards


Rocky15

 

This might be a silly idea, but have you checked the switch on the head unit is still set to premium. It was my understanding the same head unit was used and a switch used to change level of function and looking at wiring diagrams it seems there are different pin outs used at IC20 depending on whether it is standard or sat nav. set up.