Full Beam Light Partially Staying on.

I turned my bike on today and the full beam light was on but duller than usual. The full beam switch was off so i switched it on and off but it just got brighter when the full beams were on then stayed on dull when it was off.

Any ideas whats going on?

I had the same - the light isn't earthing properly. If you look at the bulbs one will have both elements lit due to the current feeding back on the hi-beam circuit.

Just route a new earth for it and you'll be fine.

Cheers mate! Is it the earth from the headlight bulb wiring? Will i find it at the fusebox end?

All the earths for the front lights are gathered up in an earthbundle behind the clocks, and then a single earth cable runs into the headstock. My earth bundle had signs of scorching (each of the front 6 lights has an earth that runs to the bundle) but I didn't pull the front loom to find the actual position of the failure. I just spliced the headlight earth into the sidelight earth - job jobbed.

The connectors for the headlights open at the back. Run a cable from one headlight earth to the other (black wire with white stripe IIRC) and check it fixes the problem before undertaking any remedial work - and check the bulb filaments to make sure my diagnosis is correct.

Cool i will do, top tip fella!

[TSM]

have you checked that the 'Pass' button is not stuck down, when pressing it, the high beam comes on, but unlike using the high/low beam switch the low beam does not turn off. The dullness would be because of the extra current being pulled by both filiments working, that would be (65w+50w etc)x2.