besides the dx not having a sunroof, is there any difference in wiring for the same year cars. lets say both are 90's or 91's.

And I am referring to the interior harness only.

 

yes.

When doing a dpfi to mpfi swap you need to add wires. therefore harnesses must be a lil different in some ways. clusters will interchange and stuff, but certain parts of the harness are different.

 

i know the engine harness is different.

 

the interior are the same except like you said the sunroof, and button for the sunroof

 

No interior harnesses are NOT the same like he said above with one being DPFI and one MPFI those wires start from the interior harness at the ECU. There is also then the sunroof wiring however in all reality that plugs into the main harness so if you cut the roof off an Si and welded it on you just need the sunroof wiring I think it plugs into the harness in one place and then also into the fuse block under the dash. The Si's also have a light around the cigarette lighter plug where the DX's dont.

 

ya thats true sorry about that info i dont know what i was thinking lol thanks for the correction