Modified the wiring loom tonight through adding a relay and taking the power directly from the battery. Bought a 4 pin relay from Maplin, £ 2.99, a 20 amp in line fuse, suitable wiriing and some connectors. Spent about an hour off and on putting the relay and wiring together in the living room and then bolted the relay to the bracket off the expansion tank.
Spliced it into existing wiring and then switch on the lights. Nothing.
It would help if I put the fuse in and then it worked. Unsure if much brighter as I need to try them out on the country lanes locally as this is what prompted this in the first place. If not satisfied, then I'll uprate the bulbs to Xenons and if no joy then, I'll source some new headlamps. Maybe I'll get the beam adjusted before getting the headlamps and stick to doing the basics first.
I've seen ready made looms on ebay for between £ 15 and £ 32 and thought I could do that, but if you're after the easier option, simply buy one ready made.
Here's the link I found which helped massively as it was very easy to follow.
http://www.matey-matey.com/uprated_headlight_wiring.shtmlEnjoy.
