UK Car Repair: SIDE LIGHT ON A CORSA, light element, test light

Question
Model is Y Reg Corsa 1.2 SXi The passenger side side light is not working, I have had the unit out and changed the bulb, even swapping the other bulb from the drivers side because I know that works. Only the brake light element works. Any help to resolve this issue would be appreciated.
Paul

Answer
You need to check with a test light to see if you have a feed at that terminal. If not, then it is likely that a wire is disconnected so trace the harness back as far as you can. If it becomes too difficult to trace, you could run a wire from the good side across to this one.