So, After spending nearly 3 hours on the landy last night (in -8 degrees) I managed to resolve the problem with the lights so I thought I'd update this for anyone else having similar issues. I decided to trace the cables from the switch on the stalk to the fuse box. I found a red/blue wire...

I have a similar issue My side lights work & high beams but no low beams. I've checked everything I can. The bulbs are good. I chased the live cable from the bulbs back to the 2 fuses for left and right main beams. These are fine. The earth for both bulb is fine as the full beams work...

I have a 1999 TD5 Defender 90 with a very strange issue. The side lights and full beams work but the main beams don't. They do come on randomly but are now totally off for the last day or so. I've checked everything I can. The bulbs are good. I chased the live cable from the bulbs back to...

I have a 1999 TD5 Defender 90 with a very strange issue. The side lights and full beams work but the main beams don't. They do come on randomly but are now totally off for the last day or so. I've checked everything I can. The bulbs are good. I chased the live cable from the bulbs back to...