[Soca]

Thinking about trying this to keep the 12V rear socket/or USBs always hot so I can charge things, power lights, etc.

https://www.4runners.com/threads/always-hot-power-outlets-pictures.665/

Any concerns with this? I mean a relay is essentially a remote switch, can't see anything go wrong with a fused connection that doesn't receive the signal to turn off.

 

[CDN-Ottawa]

not a big deal, just keep in mind that keeping the USB or 120V outlets alive will not be the same as keeping the 12V on. the USB and 120V have electronics that are on all the time wasting power even if nothing is plugged into them

I wouldn't bother modifying the relay like he does. I'd either find an old relay from scrap and solder the contacts together, or make up a small jumper with the right male lugs to plug in (make sure you get the right slots or things could go bad quickly)