Bought a 100/80 blue headlight bulb from Halfords. Getting bored with following the white line at night on three candlepower. Main beam's fine, two relays fitted and heavy guage cable all the way back to the battery, so all supply side should be good.
Took out old bulb, then saw that it was already the same as the one I was going to put in.....Hmm.
So I rewired one of the relays correctly, and Lights!
(no camera action, though).
I'd been riding for , must be 2 years, with an incorrectly wired relay- on main the two down-stream-of-the-relay connectors were the wrong way round, so when dipped beam was on, it had no earth, and was trying to return through the main beam filament.
Doh!
Went for a ride, took bulb back, went for yet more super unleaded and a pint for me of Long Blonde at the Working Men's club, as I'd been working (on the bike). Drinks all round, bike and me, anyway.
Just waiting for the weather to close in....
It's not falling off, it's an upgrade opportunity.