I was just wondering where the rear sidemarkers' (2 lights located in the rear bumper) wires are routed? Mine dont seem to work, i tried to replace the bulbs with no luck.

I did the modification that makes the foglights stay on all the time if that does anything. Don't believe a fuse is blown because all my other lights and accessories seem to work.

Wanna know where the wires go so that I can check their route.

Also, when exactly do they come on?

 

I would try un-doing the fog light mod to see if the running lights start working right again. If they do there's something wrong with the way you're doing the fog light mod. The fog lights on my car won't come ON unless I have the running lights ON. Since you messed with the wiring of one (fog lights) you may have affected the operation of the other (running lights).