I may have found the problem--a review of the electrical schematic reveals there is a diode in the Patio Lights circuit between PLS-14R and OLS-14GN. I believe this diode has failed and is allowing voltage to flow in the opposite direction. Both the Patio lights and the ceiling lights draw power from the "A" DC-essential-bus via the HPA-14BK circuit. I am going to replace the diode but am pretty sure that is the problem--I will let you know when I replace it--I just have to find it now. email me at:
geno.r.riley@gmail.com and I will send you the schematic.
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