Not a Ducati, not mine however This one’s got me scratching my head and I know there are a fair few motorbikers on here too so hopefully someone can help! Bike is a 1996 Honda VFR750F and the dip beams have stopped working. Here’s what I’ve tried, in order: – New bulbs – Checked whether I was getting power at the connector, nothing there – Replaced the relay – one of the connectors had clearly got a little warm so I replaced that too – Checked for power at the connector again – no power when everything is off, power to one pin when dip beam on, power to the other pin when main beam on – New bulbs back in and still nothing – Checked bulb by taking plastic connector apart so I could connect the main beam wiring to the dip beam filament – bulb is fine So after all that I’ve got power to the connector when I should yet with a new, tested bulb it doesn’t work, what am I doing wrong??
looks like you are doing nothing wrong, working your way through the usual suspects - unusual but have you tried output from lightswitch to relay yet? It could be actual switch contacts failing maybe from water ingress etc. Sorry just read that you have power at a connector*, so what is left in circuit between this and bulb? *so already travelled from lightswitch ok then?
Have you checked continuity on the other side of the connector to earth? If you have power to the connector then run a wire from it to the bulb and run the other side of the bulb to earth. If it works then it is an earthing issue.