I'm currently doing a obd0 to obd1 underdash conversion nd i am having difficulty making everything match up with the head lights nd taillights nd same thing with the plugs that go connected to the motor i dont know which ones go where. can anyone give me advice on how to do it ??? or have pictures i can go off of ??? this is my 1st project car nd have no expirence ... thank you for ur time ...

 

There should be no under dash changing going on. You are suppose to modify the stock harness, not swap it out.

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/how-obd0-obd1-3175858/

 

just wondering the point to doing such a process?

and what obd1 "underdash" harness are you using...seeing there were no obd1 ef's (that I know of)

 

i took the harness out of a 93 honda civic coupe ... ive seen a few efs in vegas with that obd1 underdash conversion so i decided to try it my self

 

hahahahahahahahahaha


Serious though...

You are in over your head. For sure.

You have nothing to gain by swapping that part of the harness out. You will have to repin everything that goes to the controls and use the factory plugs, or make your own. It is not a plug and play harness swap at all. It is much easier to repin at the ECU and distributor and use your factory under dash harness instead of repinning every control and module and use an OBD1 under dash harness. Hold Ctrl and press Z until you get back to where you were. (That's computer for undo)

 

yeah, can't see a reason why anyone would do that

 

obd0 is the way to go! Why would you want obd1? You want a better O2 sensor?