Wierd window problem

[Sonicadventure]

Hi everyone I am considering the purchase of a 93 FWD Impreza hatchback. It looks pretty solid and in decent shape but it has a wierd problem.

 

The car was damaged in a hit and run a while back and the owner had to get a door from a salvage yard. He got everything hook up, but ever since the installation of the replacement door, none of the windows have been working. Unfortunately he doesn't have the original door anymore so no parts can be salvaged from that.

 

I like the car and I'd like to see if we can work out a deal, but obviously the car will not pass inspection if the windows won't work. Is there a flowchart of things I could check to try to pin point the cause of this problem? I'm wondering if the door was from the same body style but a different year the wiring harness was not compatible. I've seen photos from every angle of the door and it appears to be fitting correctly in the jamb. In addition to the window issue, the door lock mechanism was not swapped out from the old door, so he is not able to unlock or lock the car from the drivers side. I'd also like to know how hard it would be to get a replacement lock cylinder made to match the current ignition key that goes with the car.

 

Other than that, the car looks pretty solid and the price is right. I've never owned a Subaru before but I've always appreciated them. What are some other first time buyer items that I should be aware of going with a 93 FWD Impreza ? Any particular motors to stay away from or things to watch out for? I've bought and repaired many used cars, I know the general things like checking for oil leaks, exhaust leaks, looking at the under carriage and suspension, but I have 0 experience specifically to Subarus.

 

Thanks in advance for your help!