You have H4 headlight bulbs so they work on dipped OR main as both filaments are in the one bulb and it would overheat with both filaments on at the same time.
If you had H7's or H1's they normally both come on with main beam as they are seperate bulbs (I suspect this is the case with your other cars)
It is an offence to use foglights if visibility is over 100mtrs. as they can dazzle oncoming traffic and are likely to get you a £30 fixed penalty.
You would be better to fit supplimental spotlights, or try adjusting lights downwards slightly.
http://www.highwaycodeuk.co.uk/driving-i...w-226.html
http://www.pistonheads.com/gassing/topic...45251&i=20
http://www.swiftcover.com/about/press/fog-lights/
If you had H7's or H1's they normally both come on with main beam as they are seperate bulbs (I suspect this is the case with your other cars)
It is an offence to use foglights if visibility is over 100mtrs. as they can dazzle oncoming traffic and are likely to get you a £30 fixed penalty.
You would be better to fit supplimental spotlights, or try adjusting lights downwards slightly.
http://www.highwaycodeuk.co.uk/driving-i...w-226.html
http://www.pistonheads.com/gassing/topic...45251&i=20
http://www.swiftcover.com/about/press/fog-lights/