Ok so I had a hard time trying to figure out which wire went to which part on the relay and where did it go from there. So I drew out this easy schematic for myself and figured if I could figure it out anyone could.
So Positive from battery to fuse block
From the fuse block off to the #30 on the relays. I just used a 30 amp relay available anywhere. Then from #87 on the relay it goes out to power your item (lights, compressor, whatever).
From the M9 fuse on the stock fuse box it goes to your switch. M9 fuse is switch on only. And spade #85 on your relay to your switch. This just powers the relay to let it close the circuit so that power can go from the battery to your item.
Spade #86 on the relay goes to a ground.
Pretty easy when you break it down barney style. I have the relays mounted to an aluminum panel on top of the stock fuse box and the bluesea fuse block mounted on the drivers side of the battery tray. It has been this way for 3 years and has never been a problem.
So Positive from battery to fuse block
From the fuse block off to the #30 on the relays. I just used a 30 amp relay available anywhere. Then from #87 on the relay it goes out to power your item (lights, compressor, whatever).
From the M9 fuse on the stock fuse box it goes to your switch. M9 fuse is switch on only. And spade #85 on your relay to your switch. This just powers the relay to let it close the circuit so that power can go from the battery to your item.
Spade #86 on the relay goes to a ground.
Pretty easy when you break it down barney style. I have the relays mounted to an aluminum panel on top of the stock fuse box and the bluesea fuse block mounted on the drivers side of the battery tray. It has been this way for 3 years and has never been a problem.