Having a day...and need some help..

Had to jockey cars around the driveway as I’m getting ready for a funeral (friend killed himself the other day) Fired up the valiant and let her run in the driveway since she hasn’t been run in a few weeks. 273/904 car. It had been on a charger.
While she’s warming up the power steering pump starts screeching and losing fluid from behind the pulley...ok. Gotta fix that. Turn car off. Top PS fluid off and prepare to drive it by my workspace.
Car starts again...get ready to move it..disconnect battery charger. Start moving it. After a few feet car dies. figured alternator may have gone too. Connect charger go to start. Dome light is on. Turn key...nothing. I did see a very small puff at the positive lug like when you connect jumper cables
Dome light is now out
Head scratching begins
I check to make sure power steering pulley didn’t seize and bind things up for some reason..nope
I check battery. Nope it’s good
I check starter relay. Nothing by bridging the gap. If the starter relay is bad will it kill the rest of the electrical? fan and wipers don’t work also
What do I check next. I’m spent and have to get ready for the funeral. Just looking for things to check when tomorrow comes

thanks guys