for some reason my cousin parking light isn't on,what i have found out so far is fuse 15 from small light keep blowing out which i think is the parking light to stay on.

can a rig up foglight to parking light wire cause the blown fuse?

 

yes a "rigged up" fog light can cause this to happen. Disconnect the fog light and let us know if that worked or not.

Fog lights should really have their own separate circuit. You could put a relay in line with the parking lights if thats when you want them to come on, but I don't recommend leaving the fog lights hooked up the way you have them now you're just going to keep blowing the fuse.

don't even think about putting in a higher rated fuse that will very likely cause a electrical fire.

 

make sure you also dont have a bad ground either