blue beasty
Leaks an prone to bits dropping off
I hate relays!!!
It took me a while to get my head round them. Mostly because I tried to work out how to wire them before why they're used and how they work...well....that and in a bit fick
Spotlights did it for me. A bank of spots might double the load on a wiring circuit and fry the wiring. So you make a new circuit. Battery....fuse....spots...earth.
You want the spots to come on with high beam so you put a relay in after the fuse and wire one side of the relay to your main bean circuit. When main beam becomes live it throws the switch in the other side of the relay in the spots circuit.
It's keeps the two circuits seperate so there's no extra load on your existing light wiring (except what's need to flick the relay but that's tiny) and the spots turn on and off when you want