How do I run wires through the firewall, do I have to drill a new hole, or is there already one that a can squeeze a couple of wires through? thanks

BTW, it is for a manual fan switch, so they need to go through on driver's side.

Kyle

 

Find the wiring schematic for your car. The fan should come on with the A/C on. Splice into the ground wire that triggers the relay with a switch inside the car. No need to drill any holes. Might want to PM trickster if you don't have acces to a manual. On my car it was a dark green wire under the pass side kick-panel. Should be something similar on yours.

 

I wired my manual fan switch in through where the speedometer cable goes through the firewall. I just put some dum-dum there to seal it from water and noise.