Originally Posted by Yamaha Dave
Well then I think we are on to something. My marker signals or turn signals that are in the lower valance in the black plastic piece were possibly wired to be functional fog lights. I noticed this when I first got the truck coming from a Ford Ranger I didn't have any, and one night after I purchased it I noticed as I was pulling into a restaurant they were indeed ON, they were very bright and they were White, and I was happy because they I needed them BAD I drive in the country roads in the early mornings and it gets misty and foggy out right at the time I leave for school. Visibility gets down to about 100-200ft in front of me. I noticed they only came ON when the truck was out of Park and with the full headlights on, when the parking lights in the side marker were ON, they were OFF. IF this is in fact the wires which when I'm off I'll try and route these wires and see where they go, it looks like the previous owner hard wired these straight into the fuse panel similar to hard wiring a radar detector. ????
It very well could be, but if you want to get it working as you want, with how its currently wired, there really isn't anything we can help you out with, with what we've been given us.
If you are able to trace down those wires to see exactly where they go, that gives us something to go on, but with the cross gauge of wires (12 or 14gauge vs 18gauge), you are either missing the return wire if its for a switch and the 18 gauge is meant for the ground on the indicator light, or the heavy wire is meant for some type of accessory (keyless, alarm, etc). There would be no reason for the heavy wire to be live (assuming it is live) unless that is the case.
This really isn't the type of job for a first time at going at wiring though. You need someone with more experience and proper tools, standing in front of the vehicle to help you out on this one, or you need to learn from the beginning, starting with a very simple aftermarket fog light setup (not just blindly following instructions, but actually understanding why its plugged in the way it is).
You're talking about messing with safety items (lights) and a series of relays. Not to mention the possibility of doing something wrong and seriously injuring yourself or burning down your truck, or best case, blowing a fuse.
For example, to wire it how you're talking you want it to be, there is absolutely no reason for any wire to be in the cab. The easiest way would be to have a relay that controls the fog lights that is signaled from the headlight power (which is most easily accessed around the engine fuse box since the headlight relays are there as well, or even off the headlight itself).