With the main relay out you have power on pin 2 and nothing on pin 1?
That means the CB is good and the main power to the relay is not good.
Check the 7.5 Guage fuse. Thats the power to the main power relay. But if that fuse was blown most of the guages would not be working. You could pull the 7.5 guage fuse, find out which side has power and read the Other side to pin one of the main power relay pin 1 for continuity.
It sounds like there is an open wire between the Guage fuse and the main power relay.
This main power relay also goes to the power seat lumbar, does that work?
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