Since I bought this rig, none of my power seats are working. Acts as if a fuse is blown, neither drivers nor passenger will move in any direction.

What should I check first? Checked the underhood fuse box, but nothing jumped out at me as being for the power seats...

Also my passenger side door lock is slow to lock / unlock. Anything that can be done for this?

 

As for the seats, you have a fuse block under the steering wheel plus the one under the hood, and the fuses for the seats are located ~~~drumroll~~~ under the seats themselves.

You'll find that the door locks on these vehicles can be problematic with age. Greasing them with door lock grease may help but it might be on its way out the door

 

Check fuse under passenger seat. Takes a 40 or 50 amp fuse. Anything less and the fuse will consistently pop and seats will never work.