I have a rex that i am going to be redoing. It is an auto so i will changing the inside harness anyways. Just wondering how hard is it to switch to and obdI inside harness. will an 89 si cluster work with the harness? and the fuel pump? any help and info would be helpful?
-sean

 

I still think you may be better off making wiring changes for the auto to stick and use a ODB1 to ODB0 adapter cable. going to be far easier than trying to graft a CX Si or some other chassis harness into it. Unless you take a Stick REX interior harness and repin directly to ODB1 connectors. Possible but a lot of work.

 

i was going to change the interior harness anyways(don't want to just rig the auto harness). and the work don't bother me as this is my project car. I figured it grafting an 92+ interior harness would not be that hard?

 

Far bigger job that I would ever mess with. Engine harness won't be plug and play with interior harness so the can of worms just got a lot bigger. More power to you for having the ambition to even try it.