I'm gonna take a shot and say it may be a relay BECAUSE the seats are set up to be adjusted with the door open to adjust between the two preset memories settings, so when the door closes, a relay would switch to disable the seats until the vehicle was on or running. But I'm not really sure if there is even a relay for this purpose.
So nothing happens at all, even while running??? I know mine won't work with the door closed and the vehicle is off, but as soon as it's running, or the key is in the on position, everything works.
With as many flukes with the electrical system, I need to ask: Is there any reason why you can't adjust the seat while the door is open and live with the "No Power Seats While Door Closed" dilemma???
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  1991 Mitsubishi Galant VR4 717/2000
Arias Pistons/Eagle Rods, '94 Talon Tranny
-Fun as hell, always broken
 1986 Chevy K20 AKA White Lightning 350, 4 Speed, 3" Lift, 32" Maxxis Buckshot Mudders
-Never broken, always out of gas
 1995 Range Rover CountyLWB AKA Darth Vader,K&N air filter, coil spring conversion, Maxxis Bighorn Mudders
-The ULTIMATE TAOS VEHICLE 
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