suzukijax

Thanks for the quick reply Bibio!
It is a sport, with twin headlights.
Managed to get the low beam to come on by connecting the earth directly from the battery to the earth pin on headlight white connector, and feeding a wire directly from the battery positive terminal to the low beam pin on the headlight white connector.
They also work using a direct connection to the battery earth as above and taking the positive from the highbeam feed at the fuse box, however the voltage drops from 11.9v to 9.5v.
If i connect directly to the low beam feed at the fusebox the low beams don't work, and the voltage drops to nearly 0 volts.

Edit to add - tried connecting loom up normally, and running an earth from one of the bulbs directly to the battery -ve, still no low beam =0(