Highbeam wiring issues

[pmaus1975]

Hi, I'm doing some wiring of the headlights on an etype jag and the lights now work (side, main) however I can only get power to one high beam (on the passengers side). When you use the dip switch to turn the high beams on, the passengers side high beam works as it should whilst the drivers side light goes off. I suspect it goes out as it changes to the high beam circuit but I am not able to work out why it goes out. When I check this with a multi meter it is showing voltage across the plug. It just goes out when the bulb is plugged in. Any ideas? Thanks. PM

 

[snowhead]

Bad earth.

 

[Besoeker]

Hi, I'm doing some wiring of the headlights on an etype jag and the lights now work (side, main) however I can only get power to one high beam (on the passengers side). When you use the dip switch to turn the high beams on, the passengers side high beam works as it should whilst the drivers side light goes off. I suspect it goes out as it changes to the high beam circuit but I am not able to work out why it goes out. When I check this with a multi meter it is showing voltage across the plug. It just goes out when the bulb is plugged in. Any ideas? Thanks. PM

Defective bulb?