Thanks, it's all been working for the last 1500 miles, but possibly water got in somewhere last week and the passenger side lights stopped working.I can't recall exactly what all reasons were as to my wiring for the Kobra but as I wired it (a 2001 2.2) I found that it wasn't always straightforward.
Attached is a set of diags created by me which may or may not help. Especially note that the reversing lights work on one side but an extension needed to serve the other side.
Dave