So today I went out to run some errands with my truck after it had been sitting for 4 days.
I stuck the key into the ignition while the driver's side door was still open and after one 'ding' sound turned the key forward to start the truck. Nothing. Absolutely nothing. No lights on the dash, overhead, radio, or anywhere else. There was not a trace of any electrical/electronic presence whatsoever. I couldn't even get the gear shift (auto) to move while pressing the brake pedal because the safety switch wouldn't release.
I popped the hood and put a multimeter on the battery - 12.44 volts - not the source of the problem.
I disconnected the positive battery terminal and gave it a minute. After connecting the battery back up I got interior lights. First try the engine wanted to start, but just couldn't. Second try it started, but took a couple of seconds to run smoothly. Once running I gave it a few small revs and they were rough. After about a minute of idle I was able to rev it and all seemed normal.
I shut it off and restarted it a few times and all was well, so off I went to run errands. No issues after that.
I don't like not knowing what caused a problem, and this one was like nothing I've ever seen or heard of before. Has anyone ever had this happen or heard of it? What causes it? Was it a sign of things to come?