What wiring harness are you referring too? The engine harness or the interior harness??ive been working on my 1990si that i saved from people that didnt love it. It was a complete electrical mess, still kind of is. i bought a broken 1989si that i could take parts from. i took the wiring harness from the 89 n threw it in the 90 as the one in the 90 was cut up and thrashed by previous owners. i was wondering what vss comes in the 1990 prelude si or would i now need to convert to a different vss of some kind?
The 90Si B20a5 uses the same VSS as the 91Si, so its a mechanical/electrical hybrid VSS.
Picture below - 1990-91
The 88-89 both use purely mechanical VSS.
Picture below - 1988-89: