Lost dipped beam in Citroen C5

[dabaldie]

For some reason i have lost dipped beam in my 02 Citroen C5
I have main, and sides and fogs (all in the same unit) but bothe the dipped beam bulbs have stopped working.
The bulbs are 10k old (3 months) and i turned my lights on this eve and nothing!
I can still drive by using sides and fogs (actually looks just like normal dips), but i was wondering if anyone else has any ideas.
Ive checked the fuses, the book says one fuse per lamp, but i checked them anyway.
Citroen said check the earth strap to the bulb as this will cause both to go at the same time.. but this seems fine.
any coincidence taht i went through a drive through car wash this afternoon?

 

[andy]

For some reason i have lost dipped beam in my 02 Citroen C5
I have main, and sides and fogs (all in the same unit) but bothe the dipped beam bulbs have stopped working.
The bulbs are 10k old (3 months) and i turned my lights on this eve and nothing!
I can still drive by using sides and fogs (actually looks just like normal dips), but i was wondering if anyone else has any ideas.
Ive checked the fuses, the book says one fuse per lamp, but i checked them anyway.
Citroen said check the earth strap to the bulb as this will cause both to go at the same time.. but this seems fine.
any coincidence taht i went through a drive through car wash this afternoon?

strange fault... could be the switch. if you press it/turn it awkard ways etc do they light up?

usin a multimeter, check at the lights to see if there is power. and check that the negative is connected to the body (or positive, if its positive earth)

 

[dabaldie]

gave up this afternoon, and as i was driving past a dealer i called in.
They knew exactly what was wrong.
actually both bulbs had blown at the same time., with the Hdi engine there can be a build up of static from the alternator drive which shorts out and blows any lights that are on.
the official citroen bulletin states to replace the drive belt with a 'non genuine' type!
talk about shying away from a known fault.
that will teach me for not checking the obvious, but then you cant blame me for being surprised they both blew at the same time.