iv been trying to find out how the car builder solutions fog light control unit is operated ,ie is the fog light then switched on by a momentary switch or an on/off switch .if controlled by a momentary switch is it one press for on and one press for off ? if this doesn't happen how do you switch fogs off without switching headlights off and back on again .?or if its controlled by an on/off switch and you turn your lights on then fogs on ,then turn lights off when you put lights back on the fog light switch will still be in the on position so surely the fogs will come back on .