There is no power going to the terminals of the passenger 'side lamp'. I changed the bulb and nothing. I then checked the fuse and that is fine. When I checked for power at the terminals using a voltmeter there was nothing and I traced it down to there being no Positive feed getting to the bulb. Is there something else between the fuse in the cabin and the headlamp that could be blown? Anyone any ideas?

Did you find the problem?? I have the same issue!