first things I would check................

put power to LED bar, and make sure it works
then
power to the switch from other relay
power from Aux battery to Fuse Block
power from fuse Block to relay



if all good

swap relay with another (I have brought a pkt of 10 relays - and only 6 worked)

ummmmmm
when checking if it was working, you DID have the high beam on..................... so power could get to the switch................