[Richard]

Very low numbers as in 0, or something higher than 0 but less than 120. I am trying to figure out if you have an open circuit, and something else.

Those lights burn out. Use search engine on this site, and you will find replacements. Careful when replacing, they are 120V.

Let’s talk about how those meters and lights get their source. If your coach is like mine, and I suspect it is very similar, the source is in the electrical panel in the rear. If you remove the cover, you will see the bundle of wires as I picture in the bottom. Each of the two feeds has a fuse. Of course the fuse must be checked.
   

Second you can see that the source is the two small red wires in the picture that are Siamesed into the each leg of the main circuit breaker.

   

This would be a good place to check that the beginning end of the circuit is getting 120. If all is good there then pull the panel where the meters and lights are located and check there for 120. Of course you will be working with live 120, and if you are not comfortable and confident then please enlist the help of an electrical guru to help you.