...there is light. Well, maybe not actual light, per se, but 5V USB power that could be used to make light. I suppose.
So yeah, my USB port project is complete!
My evening started out with a bit of worrying, because I couldn’t figure out why no power was being delivered through my relays. I eventually realized, of course, that I had to wire the relay feed lines to the battery. Which is what I had set out to do in the first place...
And my evening ended with sparks when a hot wire pulled itself free of a crimped connector! No damage was done, no young children were electrocuted to death. A new connector was crimped on with extreme prejudice and many turns of electrical tape, and everything is fine now.
It’s been nearly an hour somce everything was wired up, and the truck has yet to burn up, so I think we’re ok.