Take a positive switched wire from the fuse box up to the fog light switch. The original position for the fog light power is from fuse 15. From the other side of the switch run a wire through the firewall to a relay as the switching wire. Then run a ground wire to the relay, a battery wire to the relay, and the forth wire from the relay goes to the fog lights as the positive wire. Run the negative wire from the fog lights directly to a chasis ground.