The relay is powered up and activated thanks to a small electrical current. When it is activated, it lets a current that is much bigger than the original one flow through other two outlets. It is used to control the headlights, the rear fog light, the electric fan, etc.
Can't find altenater fuse and or relay car not charging it's got to have a fuse or relay what is the name that it's under or abbreviation in the fuse box?
Follow the alternator red main power cable back to the battery. There is a fuseable link in it. Mine was burnt all the way through. Its inside a sleeve cover so you cant see it but i could feel it.