Glad you got the no start sorted! This is a really cool truck. You’re doing an awesome job taking care of it!It was determined to be a bad coolant temp sensor. I dont know how this would be related to the 4wd fuse, but after replacing, i have not put the add a circuit back to see what happens. proceed at your own risk.
I would put the seats on a relay. Power from the battery or under hood distribution box then use one of the fuse taps in the fuse box for the switch side of the relay.
Seat motors will pull a few amps, especially if they’re older and there’s somebody in the seat