i bought a complete obd1 engine harness of a civic. I am using it for spare plugs for the vtec solenoid/oil pressure switch and o2 sensor which i will be installing onto my d16z6 that is being put into my 90 crx si. I need to know which one is the connector/plug off the obd1 engine harness that connects to the o2 sensor plug. If anyone has a pic of the plug or what wires are color coded so i know what to look for that would be helpful. I dont have my new o2 sensor with the oem plug on it yet, its in the mail and i want to get the plug soldered onto my harness so it will be plug and play.

 

bump, anyone with an answer? so many civic owners without an answer yet, cmon now.

 

bump

 

It should be running alongside the tranny (reverse lights) and water temperature wires. In other words...it's a grey 4-wire plug on the right side if you are looking at the motor from the front.

 

my harness is actually off the car and i didn't remove it , it was sent to me when i bought it, so its kinda hard to tell where the transmission would be. i'll keep looking for the four wire plug by the sensors that you mentioned. my o2 sensor should be here soon.

 

its a 4 wire plug and square looking and will be near the exhaust manifold side

 

does anyone have a pic, the harness if off the car so i can compare in relation to motor/parts on the car.

 

best I could do

 

thats perfect, but do you happen to know what color wires are on the end of that connector that runs toward the engine harness. Would it be same color wires from the o2 sensor? I'm assuming it should be but last time i went looking for it, i didn't see it, thats why i had to make this post. Thanks SkoundrelUSA

 

I think there's 2 blacks, 1 white, and 1 green. At least on my harness it is...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkoundrelUSA &raquo;</TD></TR><TR><TD CLASS="quote">I think there's 2 blacks, 1 white, and 1 green. At least on my harness it is...</TD></TR></TABLE>

That's On the O2 sensor side.

On the engine harness side; there should be a yel/blk,org/blk,wht,grn/wht.

To match them up.

[b]
BLK - YEL/BLK
BLK - ORG/BLK
WHT - WHT
GRN - GRN/WHT.

 

now thats the answer i was looking for, props to you dxcoupe and Skoundrel once again. thanks much.

 

i went to find this plug and the only plug that i see on the obd1 engine harness i have that matches that picture above has a red, yellow, brown, and blue extending out of it and is loomed into the engine harness. They are all solid color wires. Seems like the connector will fit but it doesn't match the wire colors you posted dxcoupe. I think i'll just wire it up accordingly, should work.

 

I don't think thats the right one...

I just checked my spare OBD1 SIRII harness and it was all weird. grn/yellow, yellow/black, yellow, orange/black

 

should it still work as long as it plugs in correctly to the plug on the o2 sensor and the wires are connected in the correct positions. my setup is a 90 crx si with a d16z6 engine, utilizing the obd0-obd1 ecu conversion harness supplied by rywire.

 

Yellow/Black=Black=O2 +12V
Orange/Black=Black=O2 Heater
White=White=O2 Signal
Green/White=Green=O2 Ground