Headlamp fault

[Greasemonkey123]

Good morning.
Just noticed that when flashing my main beams the drivers side dip beam goes out and there's no lights on that headlamp apart from sidelight. When stalk is release to cancel the flash the dip beam comes back on. Anyone had this fault?
Plugs aren't melted and bulbs are good. Thinking combination switch.
2003 k12

 

[Mika The Finn]

On your H4 bulb, high beam has burned?!

 

[Greasemonkey123]

On your H4 bulb, high beam has burned?!

Nope.. bulb is good and plug isn't melted. Swapped bulbs..

 

[Mach1]

On the bulk head hiding behind front right headlight (driving side in the UK) is a number of earth straps bolted to the chassis, try cleaning these up as bad earthed electrics can play havoc on the lighting system, ever followed a car when they brake, either one light goes out or both become dim or turn signal come on!

 

[Greasemonkey123]

On the bulk head hiding behind front right headlight (driving side in the UK) is a number of earth straps bolted to the chassis, try cleaning these up as bad earthed electrics can play havoc on the lighting system, ever followed a car when they brake, either one light goes out or both become dim or turn signal come on!

Just seen this.. Will have a look as I need to take both headlamps out anyway.. thankyou