I got back from my trip late last night and tried to reach Doug today but he was out. I'll call him in the morning. I spent some time searching the net and reading today. I think Patrick is correct. Everything says that these Smith's electronic gauges must be supplied by a stabilized 10V source. This includes the fuel gauge, and both
oil and water temp gauges. These are the three I am having trouble with. Hmmm.
I'll let everyone know what Doug says tomorrow.