Like the whole panel is either on or off? I'd strongly recommend having a savvy friend look at the power leads where they're soldered to the board and checking your grounds. Spending 5 bills on a hunch can't end well.
/ Guess a newby has to be in the clic to get an answer on here.
Go for the Ground. What are the chances that two separate sending units would be bad. I do not have to play dumb, but I have alot of smart friends who might have the answer on here.
/ Guess a newby has to be in the clic to get an answer on here.
Solder joints on printed circuit boards are common to break and make intermittent contact with changing weather, vibration etc. That would be my first thing to look at as long as you have everything you need for the cluster to work up to the back of it (power ground, gauge inputs)..
/ Guess a newby has to be in the clic to get an answer on here.
take a magnifying glass and check all solder joints real close. my sister in laws dodge caravan started acting up not starting and i traced it to the cluster and found a solder joint that was cracked in a complete circle. a little heat and some solder and the vehicle has not messed up anymore.