Electrics issue- roof and wipers…?

[Jas- USA]

If the car has an aftermarket radio or any other aftermarket item unplug then one by one and try the roof after each item is unplugged.

What's the thought process here- that it may be affecting the k-bus?

Yes, I went to youtube under BMW K-bus. This is one of the many that came up https://www.youtube.com/watch?v=f8uab4lB6JA


Fast forward to around 3:00 and watch. He installed an aftermarket radio and it screwed up his k-bus. When he unplugged it the car returned to normal

[bigwinn]

Well I can but try. Thanks for the tip

[bigwinn]

Radio removed. No difference

Unplugged the wiper motor- all roof and window functions ceased nothing doing. Re plugged and the movement returned albeit with the inherent issues

I’m thinking earth issue or k-bus to sort

Onward!!