Thread: L322 to Cape York

If the trailer ecu is detecting the blown/LED trailer lights then likely its also advising the LCU so switching off or cutting the data line would seem to prevent the LCU and the rest of the vehicle from knowing about the trailer. Loss of connection of the data line might trigger an unacceptable fault but that's easily tested. Can you just unplug the trailer ecu as a first test before proceding to instead cut the data wire?

Originally Posted by Graeme

If the trailer ecu is detecting the blown/LED trailer lights then likely its also advising the LCU so switching off or cutting the data line would seem to prevent the LCU and the rest of the vehicle from knowing about the trailer. Loss of connection of the data line might trigger an unacceptable fault but that's easily tested. Can you just unplug the trailer ecu as a first test before proceding to instead cut the data wire?

I will tonight. IMO the car will just operate as if the trailer ECU was not installed. Big question is whether the LCM activates the lines carring tail/brake/ind signals to the trailer ECU if the trailer ECU is not present on the iBus. I'm tipping it will, my brake controller is getting its brake light feed from the wire between the LCM and trailer ECU, and it is active whether a trailer is there or not.

will advise.