I just bought bought a 99-00 Civic Si engine harness from a Friend, It was removed completely from the engine, Nothing cut. My plans are as follow, I want to put it into my LS/VTEC 96 Hatch with obd2-obd1 plugs. My question is, do Si harness come only with Two Plugs for the computer or 3, I looked at the harness and it didnt have any wires cut at the Plugs, so I know its not missing the other Big Plug, Its has Three plugs right now, The Green one that connects to the Under-dash Harness and then One Blue one and a Medium Sized one but it doesnt have the Biggest of the Three PLUGS that plug up to the Computer. I am going to post a picture of the Plug sided of the engine harness connected to the p2t Si computer.
Anyone else Have that problem.

 

The plug styles changed in the 99-00 model Civic's from the OBD2 (96-98) to what most people call OBD2.5 or OBD2B. The 99-00 Si harness will not work sorrectly with the 96-98 chassis. Although they look similar and the 2 connectors plug in, the third will not so it's not worth the hassles for the rewiring involved.

 

yes, i ran into that problem with a 2000 gsr harness, its obd2b. SUXORS.

went today and got a 96 gsr

 

It looks like you may be missing a plug...even if you weren't, you'd have to re-wire that green plug to work with your interior harness anyway...I found this out the hard way! Wiring sucks...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECVillain &raquo;</TD></TR><TR><TD CLASS="quote">The plug styles changed in the 99-00 model Civic's from the OBD2 (96-98) to what most people call OBD2.5 or OBD2B. The 99-00 Si harness will not work sorrectly with the 96-98 chassis. Although they look similar and the 2 connectors plug in, the third will not so it's not worth the hassles for the rewiring involved.</TD></TR></TABLE>
Villian is RIGHT on the money. I had this same problem with my 96 hatch.. got the right one for the car, and found out they rewired the car to 99-00 spec. Had to get another one. Just sell that one in classifieds or EBay and get yourself a 96-98 harness. That will be exactly what you need. Good luck!

 

Yea you need to sell that one and get a 96-98 ex harness. Can be had for about 100 bucks.

 

i have another 97 gsr harness ill let go for about $50. PM if you are intersted.

 

I cant find a Harness up here in NYC, There is like a shortage of them, Can You find me One??? I have looked up and down online, Shops and nobody has it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2k1_ITR_0736 &raquo;</TD></TR><TR><TD CLASS="quote">i have another 97 gsr harness ill let go for about $50. PM if you are intersted.</TD></TR></TABLE>

You can't use a gsr harness in an EK chassis!

 

Listen everyone, I just found who has the harness, Ordered it up today, Cost me 135 Shipped to My Door, Cant wait to get my Hatchcrap Running again.
Anyways I am going to have a 99-00 Si Harness.