Hi everyone, I got this working. Many thanks to @nicedayforit for the help.
I was focusing on the back fuses and relays. I applied 12V to the relays to make them close, then tested the terminals for continuity. They were working fine. So then I tested the rear fuses, they were all looking ok but some didn't have power. So I figured there might be a fuse in the front box that feeds those fuses. Long story short, if you 2005 L322 rear blower, rear heated seats, cig/aux lighters don't work, check Front Fuse #2. Its a little 5amp fuse that took me all Saturday to find.
But, I learned some stuff today about my vehicle, about this community, and about multimeters.
cheers, SD
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