Several List members responded with good suggestions to my question but one
suggested I get a meter and measure the actual voltage on my auxillary
battery after running the engine to recharge it. I did and found that the
battery is at 12.5 volts, a good level. So, I think my problem, if I ever
had one is fixed. My monitor light goes to a yellow condition as soon as I
turn on the fridge but now I know that the battery is being recharged by
running the engine.

Thanks to List members who took the time to respond. A lot of experienced
people monitor this List and I recommend more of you post your responses to
the List.