I notice two abnormalities when you turn the ignition to start: The odometer goes blank and all gauges drops to zero. It looks as though the PCM is losing power with the ignition in the start position. Have you checked the odometer trip meter to see if it's resetting every time you start the engine?
I would begin by removing the entire battery wiring harness (connects to battery, PDC, alternator, starter, engine block, firewall). Clean all of the connections and ground points til they are shiny. There is also a ground harness from the driver side of the head to the firewall that needs to be checked.