[jacksbeemer]

Originally Posted by ontheway

Could be LED lights or maybe you don't have all the lights the car is expecting.

https://xoutpost.com/bmw-sav-forums/...lt-dash-2.html

That's what BMW tell me but I get the same fault on the bike carrier (possible LED lights), a bunnings trailer with a 7 pin round (doubt they are LED) and an old trailer with 2 adapters 13-7 & round to flat).

I think the 13-7 adapter needs a diode but what would I know!