Cadillac Power Seats
OK, here's some info for you, based on my research into my 90's Cadillac Eldorado buckets:
"blk has 2 wires, blk and orange w/blk stripe": Blk is ground; orange w/blk stripe is 12V constant power, typically fused @ 20-25 amps.
"blue plug has 4 wires, pink w/blk stripe, green w/white stripe, blue w/white stripe, white w/blk stripe": This connector goes to the Cadillac seat control switch assembly (pic). From my experience, it will be VERY difficult to operate the seat without the Cadillac button assembly, as it contains a basic printed circuit board to cause multiple on/off actions when each button is moved. I found my switches on E-Bay.
I would also suggest buying a small sealed scooter, or motorcycle battery, for bench testing 12V electrical components; they give more consistent voltage than a battery charger. Attach some made-up 12 gauge test leads, with covered/protected alligator clips, & you can test any NEW circuit, anywhere on your ride.