I need some help simplifying how to wire up some aftermarket fog lights. My bumper has the two spots to cut out and mount the lights. I just need help in describing the wiring of the lights. Do I need to buy any more fuses for my fuse box or do I just add the wiring to the existing circuit. I do have an existing factory switch inside of the truck. I would appreciate any help with this. Thank You!

 

Just use a relay and wire it parallel with the headlamps. That way if anything shorts out they wont kill the circuit to the headlamps, especially at night.