Thank you all - - - I will have it looked at with this feedback.
KD4UPL, I did not have a Voltmeter to test the Batteries, but had the a 12V Deep Cycle Battery Charger, registering 100%. Batteries were new last year. I will get a Voltmeter for future use. I should have re-worded my post, I had the Knife Switch connected during 3 hr. drive up the camping spot. Just Disconnected / Reconnected when trouble was realized. Maybe some combination of what Westend and Lynmmor suggested - - especially if the Voltmeter shows batteries are ok (which I think they are). Thanks all...