No Crank, No Lights, No Click, Battery Not Dead?

Update, both good news and bad news. Bad news.....problem came back, after a closing shift at work of course! Had to leave it overnight. Came back later and took the battery over to get tested. Tested "good, but needed a charge." only took 20 minutes to charge. Hooked it back up, and some light came back on. Huh.

Went into my work and ended up chatting with a couple people for about 20 minutes. Came back....no dome light, no click, nothing! Never had it gone away so fast! Frustrated, I began to look underneath, look at my pathway again. Someone who was with me took my multimeter and began to test a few points. I was wiggling connections on the bulkhead connector when I heard a 'zap', and saw my done light flash back on! "...The lights back on! What did you do?"

All he did was take the positive multimeter prong and touched it to a connection from the starter relay to the positive battery. It arced on something else connected to the relay.

Managed to drive it back home. But that did something very weird to my gauges. My gas gauge suddenly stopped working ( update: it's working again after this morning firing it up) and my ammeter isn't showing that I'm getting my battery recharged. If I were to use a turn signal driving, it was slow and acted like I was idling with the largest load to the system. It only shows that there is a significant load on the electrical system ( needle pointing towards -20) and if I hit the gas, it fails to go into the positive recharge area of the gauge. I don't know if that's an accurate reading or not, and definitely wouldn't want to run on just the battery if the alternator can't charge! I will be cleaning up connections at the relay, possibly even replacing it. I hope I didn't fry anything when that arced! My fuses are all intact as well. Didn't see any smoke.