Often every cab often gets the same primary wiring
there are 3 sections to the primary wiring
before the cab is set on the Chassis, they lay the harness that goes back to the tail lights along the frame
They then lay the engine harness just before the cab is lowered on chassis
Then the cab is set on the truck & in In Cab Harness is laid out inside the cab.
Then the floor covering is laid & the dash board is inserted into the cab & the plug in the connectors that will be used & the unused pigtails are put in Dummy Plugs.
lastly the seats are installed, the needed connectors are plugged in, the unused plugs are taped to the harness.
So what i am saying, the harnesses are likely already there
When you purchase the power seat panel, that is fastened to the drivers seat, chances are a separate pigtail could be an option for the 3 motors, the heated seat pad & lumbar cushion
seat heating pad, check with Benny, he may have it also
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