Gabe624

iTrader: (1)

What kind of harness should I be using? Ive read through countless topics, but its hard because my car is so much of a frankenstein that I dont know which topics relates to me.
About the car: I have a 97 civic ex automatic, it has an 00 front end conversion, and an 00 dash conversion. And soon to have a jdm b18c gsr manual engine.
Heres what Ive learned: Correct me if anything is untrue.
The gsr harness wont fit into an ek chasis. The gsr ecu is obd2a. 96-98 civics are obd2a. 99-00 civic are obd2b. People say use the stock harness, but it was automatic, so I sold it. Ive been told to use an ex or si harness.


Now, I found a 99-00 ex harness for a steal of a price. Ive been told by some sources that I shouldnt use it since its obd2b and I need obd2a.

1. Should I buy this 99 ex harness or should I keep shopping for a obd2a harness?
2.Do I want an obd2a harness because the car is obd2a or because the ecu is.
3. since everything on the car is 99-00 including underneath the dash, Should I be shopping for obd2b?
4. If not, then why do people suggest an SI harness when thats obd2b?

grumblemarc

iTrader: (4)

Everything I've ever seen says to use the stock harness that came with the car. Anything else might be asking for headaches.

vtechjunkie

iTrader: (2)

^^^ Good advise

Gabe624

iTrader: (1)

Can anyone say for certain weather or not the under the dash stuff will work since its all 99-00?

doctorake

What type of dash harness do you have? Does the car have all the original wiring harnesses except the engine harness?

Gabe624

iTrader: (1)

Under the dash I swapped just the climate harness. Thanks guys, I think I got all the answers I was looking for. Mods you can close this if you wish.

sleepyaccord96

if the ecu plugs are still original you are in good shape. You need to use a 96 98 auto or 5 spd harness. (civic harness)

Calhonack

I have a 2000 civic ex and swapped an obd1 b18c1 and used my original engine harness in my civic, it was almost plug and play besides the distributor and a sensor on the intake..no iab bc I am running a first gen skunk2 intake manifold.