has anyone ever wired a set up with the OEM switch and harness
I have everything but the wires between the harness with the switch and relay and the fog lights

 

So, you are missing the wire running from the switch harness to the fog harness? You can run a single 18G wire through the firewall to connect the two harnesses. This is what I did in my 92 hatch, since there wasn't one from the factory. I crimped on female-side spade connectors on the ends which plugged into the harness connectors.

 

I know where to plug everything in to the harness at but then what? i mean what do i have to splice after that and what one

 

anyone?