Sorry I didn't explain the problem.
The first regulator is a Fairview Model GR-9984-A. the problem was the indicator stayed green and emptied both tanks. It's still green with the regulator off the trailer. I think the second regulator is a Cavagna Group Type 924N. This one started clicking so I removed the tank cover and it showed green I turned the tank off that it was switched to and it still clicked so I turned that tank back on and turned the other tank off and the clicking stopped and about two minutes later the indicator turned red so I turned the full tank back on and the indicator turned green and no clicking.
Thank you.
Wayne