i recently swaped cluster from 89 civic dx cluster to 91 si cluster. i have a b16a on my hatch. the ecu gives me a code for speed sensor but i cant quite figure out what wire comes from the ecu to the cluster. there is about 3 yellow wires . but they are for oil pressure. but none of them work what could i do.

 

Have u tried looking at the wiring diagram? I just did a k20 swap on a crx and i have the wiring diagram for the crx. So, if its the same ( I guess) I might be able to help u.

 

DO A SEARCH, every week theres a cluster problem question on HT

 

https://honda-tech.com/zerothread?id=1986294
theres the 88 89 and 90 91 hatch diagrams if you have a crx cluster just search for it, that took the better part of 45seconds to find.