Ok, here it is: I have a 98 DX (OBD2A) without a wiring harness. I plan on putting a 2000 b16 (OBD2B) in the car. it comes with the harness and ecu. How different is the wiring? Does that tach need to be rewired? I'm just hearing rumors.. If anyone can clear it up that would be great.


Also, I plan on running a OBD1 ECU, If it matters.

 

well being they are both a 1 peice harness i would say yes.. i know if seen someone use a B harness in a A car.. not sure if it worked or what needed changed

 

it will work cuz i did it , the only thing that wont work on ur cluster will be the rpms. that can be fixed up by hookin up a tach straight to the coil in the dizzy.

 

will the speedo work to?

 

anyone have any more information?

 

The 96-98 harness has 3 plugs and the 99-00 has 2 plugs and then the rest is inside the dash. I dont know if its worth the trouble and how much needs to go in to make everything work. I was going to do it but ran out of time to try it so i just reused the harness i had. If it works more info would be nice for future reference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">The 96-98 harness has 3 plugs and the 99-00 has 2 plugs and then the rest is inside the dash.</TD></TR></TABLE>
well thats news to me, i learned something new today.

 

I don't think you can simply re-use your DX harness - you should be using the one that comes with the Si motor unless you are comfortable with running a bunch of loose wires separately. Search for a post by Katman - he has posted a number of diagrams that explain differences and what needs to be done to wire up the motor correctly.

 

The thing is I dont have my DX harness. I know I could run the car with the DX harness, wire VTEC/knock etc, but i dont have the DX. I have the chance to use the 99-00 Si wiring harness.

I'll search from him though, thanks.

 

found that post, great post... check it out here:

https://honda-tech.com/zerothread?id=558245

katman

 

Yes, you should use the Si harness. You might need to swap a couple of pins at the harness - all of this information will be on Katman's diagrams - the guy has done an immeasurable amount of research.

 

katman doesnt describe what i have to repin. i know that the 99-00 harness' has 2 plugs for the ecu, while a 96-98 has 3 plugs for the ecu.

 

In that case I might be thinking of a different swap (I did a 00 GSR motor into a 00 hatch and I had to repin).

 

yeah, thats two obd2b motors. i want to use a obd2b harness in a obd2a car, hmm.

thanks.

 

If you use the obd2b harness, for it to work you will also need to use the obd2b dash harness because one of the 3 plugs going into the ecu comes from the dash harness in an obd2b civic unlike obd2a where all 3 plugs come right off the motor harness.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sal &raquo;</TD></TR><TR><TD CLASS="quote">If you use the obd2b harness, for it to work you will also need to use the obd2b dash harness because one of the 3 plugs going into the ecu comes from the dash harness in an obd2b civic unlike obd2a where all 3 plugs come right off the motor harness.</TD></TR></TABLE>

ouch. so the verdict is: it can work, but it isnt worth it to make it work.

thanks guys.

 

DONT use it wont work. fans will not turn on vtec wont work it wont read speed sensor so cluster wont work except temp gauge. but it will run LOL i did cuz its my daily drive

 

hahaha, thanks man. id like most of that stuff to work, i think i found a dx harness