I'm switching everything from a 89 NA to a 91 NA GXL. the 89 didnt have power windows or a sunroof and the GXL obviously does. i only have he harness for the interior of the 89 will it work in the GXL

 

You Might Have To Get A Cpu & Interior Harness That Corresponds To A Fc With All Of The Electric Options

 

I figured that all the harnesses were the same

 

Not sure about the harness, but the CPU is different. you will need an actuator on the passenger side for the power locks (only the passenger side has one. when you push the driver side down by hand or turn the key, it switches the passenger side).

good luck finding power window switches in good shape.

 

I've got the switches and the doors with the power windows.