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Old 09-21-2016, 06:33 PM   #1
H22Swagon
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H22 CB7 wiring harness multiple questions

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question bank :

1.Which harness should I use when putting a jdm h22 in a cb9 wagon?

2.Can I use a header with the o2 located after the oil pan or is that an ODB2 thing? Does it matter? Which setup is best performing?

3. Do I need to have a male over a female o2 sensor? reason im asking is that currently the setup included some goofy female-female jumper to connect a male harness to a male o2 sensor. I know. Stupid. Right?

4. What are the four wires on the o2 sensor for? Also the weird exposed wire? is that important becuase I dont think my car is accomplishing that with that goofy jumper.

car runs fairly well. adjusted the valves today and mended the distributor by swapping out the rotting 2 wire plug with a fresher one. They tend to rot at the rubber grommet that leads into the dizzy.

Below is the long story.

Help long story short the harness that this h22 cb9 wagon came with is in poor condition and not ideal. My best guess is that its an OBD2 harness. I have a non vtec cb7 coupe harness that I have been told is the harness to use and to build on by extending lines and what not ? Is this the best idea?

Also the header I purchased has the o2 sensor bung after the oil pan as opposed to the one currently on the D/C header closer to the block. Which is preferred and or performs best? I'd prefer the oil pan one for if anything less clutter under hood. I rarely make decisions based on form. I also want to preserve the o2 connector in uncut condition by depinning and preserving all four wires, especially the weird exposed wire that goes around one of the 4 uncut o2 sensor harness end connector. I have both a male and female end 4 wire connector to choose from . Which one should I use? The o2 sensor is currently a male end that goes into a female to female conversion that then goes to a male harness connector When I pulled the harness from a 2000 civic I noticed that 2 of the wires appears to go to their own block of some sort. I'm guessing its a ground block and a 12v switch block? the other 2 feeds to the firewall. which setup is most OEM? I have been taking care of various things but would want to understand what my solution for wiring the o2 as well. The car runs pretty well for such a shitty harness. no cel and vtec functions. 20mpg more or less. So i'm not in a rush to have the car in doubtful condition
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Old 09-22-2016, 01:33 PM   #2
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1) The stock CB7 harness, with the addition of extra wires.

2) Your o2 sensor must be located before the catalytic converter. It doesn't really matter where it is located. A header designed for a 4th generation Prelude VTEC will do the trick.

3 & 4) Your o2 sensor should plug into your stock harness. There should not be loose wires. If the sensor has loose wires, toss it... and replace it with a brand new Denso or NTK sensor made for your car's specific year and trim. The o2 sensor plug depends on the car itself. The o2 sensor itself doesn't really care what engine it's attached to. If your stock harness is too short, you can unwrap it a bit to extend it. A subharness should not be necessary (though a subharness is a MUCH better solution than spliced wires, which can alter the signal from the sensor, causing it to operate improperly.)
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Old 10-01-2016, 06:30 PM   #3
Angel_CB7_787
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What harness did u use?
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Old 10-01-2016, 06:32 PM   #4
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Factory CB7 harness, with necessary wires added.
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Old 10-01-2016, 11:50 PM   #5
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I just wanted to throw this out there as these types of services are becoming very affordable. CJ has been making harnesses for years and posts Instagram updates daily for the Honda harnesses he builds. He builds each harness from new wiring, sleeving and connectors for each individual application. Here is his Level 1 harness for $350!

http://cjswiring.bigcartel.com/produ...-h-non-milspec
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