I have just fitted one of the xcarlink boxes to my gtc to get my retrofitted OEM rear camera working. I did originally try to get it to work as per factory, but due to mine being a VXR the coding would not allow it.
I did thin out the xcarlink loom considerably, only three wires now go to the back of the Navi 950 = red wire +12v, CAN low, CAN high [I joined the red +12v wire to the yellow +12v wire]
The negative goes direct to the chassis, the orange wire direct to the green/white (reversing lights) and the camera video feed goes direct to the rear camera.
Thats all that was left, the rest got binned
Hopefully there won't be any RFI, but time will tell ....
I did thin out the xcarlink loom considerably, only three wires now go to the back of the Navi 950 = red wire +12v, CAN low, CAN high [I joined the red +12v wire to the yellow +12v wire]
The negative goes direct to the chassis, the orange wire direct to the green/white (reversing lights) and the camera video feed goes direct to the rear camera.
Thats all that was left, the rest got binned
Hopefully there won't be any RFI, but time will tell ....