Hey honda tech

I have a pair of fog lights on my hatch that arnt working ... Pretty much i only have the lights ...

I only need the harness and relay
But i been searching for info and i know how to hook it up and the installation process ..

My question: Can i use a spare headlight relay from another car as a fog light relay or do i need to use a specific fog light relay for the set up ??? Also does any one have any info on how to make my own harness in gonna hide the wiring ???

Any info or good suggestions i would greatly appreciate