I just bought a 90 4runner that didnt have power windows or locks. My driver door had a big dent in it and so I found someone scraping his 4runner and I got 2 new doors. They came with power windows, locks, and mirrors. Was wondering if my 90 has the same wire harness even though it didnt have power windows, locks, or mirrors. The doors have the original wires and plugs. Thanks for your help.

 

It might have the harness but the relays may not be installed

The best thing is to get a copy of the Toyota Electrical Wiring Diagrams

It would show all you need to know.

If I had that year I would be glad to help.

 

The plug in on the driver's side would be easy to find on the left kick panel if it is there.
The plug on the passenger side is buried behind the heater blower motor on the passenger side.
if you find the plug on the d/s side you will be good to go.

 

I do not know the 89-95 as well as I know the previous generation. On the 84-88 trucks, the power door options has to be built into the main harness for those to function. I am assuming that will apply to your year truck as well. I am sure you could tap into the harness to make it work, but to just plug it in like the factory did you probably are not going to have that option.