OK, OK, I went to Autozone and ended up getting a new battery. (It was five years old, so about due anyway.) The alternator checked out fine too.

But I still have the electrical surge. Can anyone tell me how this ELD thing works? What does the ELD monitor and what does it control?

It only does this when the engine is running. If I just turn the ignition on, the lights, fans and everything run steady.

Just opening the door, the dome light seems kinda dim. Is there anything that would cause low voltage to the inside fuse block?