Hey. I had an issue a while ago where both dipped beam bulbs blew and as I'm a stupid numpty, I removed the main beam bulb on the passenger side by accident. I quickly realised my mistake and popped it back in. Unfortunately, since then it hasn't worked. I thought I had blown the bulb by handling it or something, and fancied a change overall so I ordered some Osram Cool Blue Intense replacements for the main beam, dipped and sidelights and got around to fitting them today.
Unfortunately, the main beam bulb on the passenger side still doesn't work. I can't find my multimeter and it is getting dark now, so I have had to call it a day in trying to fix the issue. However, some of my problem solving has narrowed the issue down to the wiring within the headlamp assembly itself I think. I have switched headlamp assemblies over, trying the driver side on the passenger side power connection and vice versa and the issue persisted. I've swapped the bulbs themselves over, and the issue persisted for the bulb in the passenger headlamp assembly. Visually, the wiring for the power supply to the bulb itself looks fine. All other bulbs look fine, including the side light in the same assembly. I've swapped fuses around, but no difference.
Before I go around poking in places I don't really understand, has anyone got a good idea where to look once I pry the headlamp assembly. I don't really know my way around electrics either, so anyone got any idea what kind of result I would be looking at when I do find my multimeter (I assume 12V at the connector to the bulb?). Any schematics would be gratefully received