Ok, I bought some fog lights for my car. I have the wiring ready to go (car didn't come with them), but I don't know which plugs is which on the stock fog light switch (bought at a swap meet). There are four plugs on it.
There are arranged like this with the I's being plugs and the .'s showing empty spots
I
.I
II

I know that one is ground, one is ground, on is power and one is to the lights, but what is the 4th for and which is which. Thanks alot.