The same old chestnut: how do you wire in the relay to operate auxilliary lamps, this time on a 2007my Terios? I've tried all the suggested ideas, but so far nothing seems to work - the auxilliary lamps come on with main beam (correct), but then stay on with dipped beam (wrong!). If I try to find the neutral return for main beam AFTER the column switch, should that give me the correct feed through the coil of the relay, and then to earth?

I've solved the problem!! Link the two coil pins on the relay to the two wires going to the main beam lamp, but in parallel. Thanks to Andrew Station, a very clever domestic electrician!!