All the other lights are working it just seems to be the headlights. does any one know what may be causing this and also how it can be fixed?
the car is definately a 1.9. it is a diesel. thanks for the help but all this stuff with fuses and relays sounds really confusing to me! think im just going to go to a garage rather than take a look myself! cheers again though!!!

Occasionally, the high and low beams are on separate fuses. So, the easy first test is to check all your fuses.

Next, it is very easy to have one low beam headlight burn out and not realize it. If the second light burns out, it will appear that those lights suddenly quit working, when really they burned out one by one.

l have the Peugeot 306 electrical schematic in front of me now. 30 fuses in the fusebox. All 306 is except the Gti- 6 speed model.

Hmmm, strange. l see fuse #19 (10 Amps) for the High beams, full beams. There is a relay block of course.
The high beam & low beam ''filaments'' r inside the same bulb, & these filaments r BOTH controlled by the same relay, & the same fuse.

If fuse #19 is burned out, u will also lose ur dashboard indicator lamps for 1)Parking light 2) full beam 3) low beam . Nothing else.

l would therefore guess that ur fuse #19 is fine, but, indeed, both low beam filaments r burned out within the same short timespan.

(note..IF u have & early model 306, with only 13 fuses...then fuse #1 controls ur headlamps. But with a 1.9 engine, l think ur car is newer than..1997. Are u sure ur engine is not a 1.8? 1.9 was a diesel.)