Originally Posted by allypally
Probably the only difference may be a possible EVIC error codes if the load (current) on the trailer connection was too great.
The autoelec told me that only codes that relate to MIL give a warning by display.
Other codes set by the car are accessed by the dealer once it is connected to the US. This allows them to track and trace and reset apparently.
Canbus issues can get very complex once the computers in the car get doing strange things together and it may be that something will not cause a software issue on 4 vehicles then scramble the 5th.
Anyway based on my recent experience with the canbus (dealer install issues) in ours I'm keeping away from tapping into it anywhere.
That said I've taken the brake controller actuator wire from the trailer stop light circuit plus aux feed from the battery terminal. That's all good. (so far)