I have the same unit. Today I traced the inverter line back to a transfer switch behind the converter unit. I don't know if it was original, but you may want to trace the wire from the inverter to where it goes...it should go to a transfer switch that allows power from the inverter or shore power to specific outlets. My inverter powers up the outside and bedroom TVs, the outlet in the bedroom above the bed, and the outlet in the cabinet above the sink where I have my DVD & VCR wired. You may not need a wiring diagram, just follow the wire to the transfer switch...or just unhook it from the bad inverter and hook it up into the new inverter.
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Deadeyedick
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