Interesting issue. 1999 VW beetle, 5 speed manual. The daytime running lights work, but as soon as you turn on the headlights the headlights go out, all other marker lamps turn on as expected (the DRLs use the same bulb as the headlights - the high beams are separate bulbs). I've checked the fuses (all fine), tested the headlight switch by using a known good one. Any ideas?
Thanks in advance.