i have just bought myself a 98 civic EX vtec harness.

i have noticed that it is missing the secondary o2 sensory on the harness.

i have read that i can rather buy the cabin harness, or re-wire the secondary o2 sensor.

i would rather buy one, but yet. i have no clue which cabin wiring is it.

other than that, i was wondering if there is another way to rewired the 02 harness through the EX engine harness?

any help gladly appreciated! *thumbs up*

 

anyone>?

 

on the ex si harness the secondary comes from the in car harness.
i was told there is a way to wire it straight to the ecu

 

I'm going through the same thing with my ITR swap right now. Unless you can find a great deal at a junk yard, you wont want to buy a chassis harness. It's like $1200. Some OBD jumper harnesses are prewired to receive the secondary O2. I believe JHPUSA(Katman), and Skunk2 make jumper harnesses like this, not sure about Hasport. You still have to run the wires from the O2 connector to the jumper connector, but that's easy.