so would it be right to guess the gauge is bad, or the resistor? Next question, if the gauge is bad, are they able to be removed from the bezel to be replaced?
After the instrument panel is removed from the dash and placed face down on the workbench. The plastic bezel is removed, then gauges can be removed.
The rally inst' panel you have is one of the more difficult to remove. Standard panels don't encompass the radio and climate controller so those are easy by comparison. Even so, lots of owners have struggled to remove standard panels.
You're going to need a factory service manual.