Originally Posted by skandero
But how can it be possible? The hi/low bulbs are separated and there is one thread in each bulb... And both bulbs are working, when the bypass trigger and hi beam switch are activated togeter...
Dirt in the off/parking/drive light switch. Driving light position was corroded and covered with dust after last offroad ride. Simple solution.
Missed that you aren't in the US. Our headlight is different and uses a dual filament H4 single bulb.
Glad you got it sorted out.