one of my bulbs went the other night so I went to change it, put a new bulb in and still didn't work. so I tried the bulb on the other headlight as this was working fine but still no luck, and after changing them back round none of them would turn on? ive checked the fuses, and done a continuity test from the headlamp plug its self to the fuse box, and all seems ok. The only bit I am unsure of is that on one headlight I only get a beep from the continuity test on the wire it is suppose to go to in the bottom of fuse holder 4 (this is also crimped together with another wire) but when I test the other side headlight I get a beep from the bottom of fuse holder 5 aswell as the top wire in fuse holder 4 this is a much thicker yellow wire than the 2 yellow headlight wires. Is this suppose to be happening or is something wrong?

I have also changed the headlight switch itself so that has been eliminated as a problem.

Any ideas would be much appreciated