"Shack" wrote in
ink.net:

Is
it just resistance

Yes....nothing special....same way-off reading the mechanical guages gave
you. The display is hosed, or you may have some supply voltage problems
feeding the display electronics from the battery. Digital displays, just
like the cars, has a voltage regulator dropping the battery to 5V or so to
keep the starting/charging/switching changes off the computer circuits that
won't tolerate it. You may have a bad display regulator IC in the
panel....common in cars. Wrong power supply voltage makes them snakey.

--
Larry

You know you've had a rough night when you wake up and your outlined in
chalk.