Thank you very much for the answer. I just retruned from a trip that took 37
hours of flight time and didn't feel up to a total repair that night. I always
intended to replace the element, but was trying to figure out if I needed
anything else. The curious thing is when I replaced the upper element and
returned the wiring to the original configuration, the lower element did get
powered. So I'm still a little confused by the wiring diagram as I don't see
how the lower element would only get powered if the upper elemnet is OK. The
bottom line is I jury rigged it for us to get showers that night, replaced the
element the next day and all is well.
One question, why did some people assume I was trying to be cheap and not
replace the element when all I was trying to do was get an explanation of my
observation that confused me?