When all else fails read the prior owner's notes.....LOL! I finally got out the prior owner's notes, and right there at the bottom of page 17 (of 73 pages of hand written notes) it says H2O pump - 2 switches! One in bathroom, and one in kitchen under counter on right side of sink! I went out to the motorhome, and sure enough, there it was, the second switch! One of our grand children (it's about eye level for them) probably turned it on...we didn't even know it was there! Problem solved.
Michael...thanks for your assistance. I am now the proud owner of a multi meter now, and have an extra switch. After testing the switch and determining it was working properly I had to believe there was a second switch that had so far eluded me, and finally read the notes.
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