No diagram. But if I can't explain it I could draw something up.

Relay switch would need a positive and ground. Positive would be spliced into the highbeam wire from one of the headlights to pin 85 on the relay. You can disconnect the headlight and using a volt meter determine which one is the highbeam (this works for the OEM HIDs and halogen as both have a wire for highbeam). The ground would be pin 86 on the relay, well find a ground . To

On the controlled side of the relay (pin 30) connect the positive to the battery with an inline fuse. Connect the outlet (pin 87) to the fog lights positive (the positive has different colour wires for each fog but for the 13's anyways the wire is grey for ground on both fogs, so grab the other wire. I do believe one side is orange/grey). And then cut the positive wire to the fogs (between the splice and the vehicles wiring harness) and secure safely so no grounding could occur.

 

Good description, I can understand that, just about what was running around in my mind. One question, do you do this for both fogs? Or just run a separate feed off pin #87 to each light, in a "Y" configuration?

 

I did the "Y" configuration. I can a single wire to the passenger fog then at the fog I spliced in and ran it across the front bumper to the drivers side. Can't see any wires that way.

 

Excellent! I don't plan on this for my 150, but for my Ranger, ofcourse the method would be the same, just different coloured wires. No problem there, I've got the Ford shop manuals for the little guy.
Every vehicle I've had that had fogs, IMO they were useless, nice decoration though. Using this method, I may actually be able to replace the fogs, with some real lighting, and have a way to conveniently switch them, without having to remember a separate switch.
Thank you.

 

No problem.