here is how I did it with my hella FF1000's
May or may not be the best way, but it does what I want.
I got a second relay, I vampired the high beam ground to activate the relay. When high beams go on, the relay activates and allows the signal from my stock fog light switch to be connected, which then goes to the new hella driving lights relay. The driving lights relay is obviously now activated and the lights go on and off with my high beams.
However, I wanted control over the driving lights with the stock switch. But the stcok switch would shut off its signal when high beams go on. Take out the switch, their is an unused terminal, jam a wire into it and use that wire as the interupted signal for the hella relay.
following me?????
If high beams are on, then the stock foglight switch turns the hella's on and off. The driving lights will only work when high beams are on, so they go off when you turn high beams off.
This is good for driving lights, but conter productive for fog lights.
I caould draw a diagram if it helps.