Since I believe everything should be in the same places, would an Integra harness fit in a Civic? I ask because my Civic's harness is messed up somewhere and I just can't figure out where. I'm going to the junk yard and if an Integra harness would work, it gives me another option and makes an Integra cluster plug right in.

 

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What model Civic? Engine harness, cabin harness, both?

 

You can use the engine harness.

 

Why I was asking was that a few things might differ such as 1 wire 02 vs 4 wire and their location.

 

Should have specified. The under dash engine harness. The one that connects to the ECU, engine harness, and both fuse boxes. Internet went out last night, and couldn't check before I headed off to the junkyard today. I couldn't find a 5 speed Civic, but found another automatic that wasn't wrecked too badly in the front but had ABS, so it will be just like the harness I have now, and have extra wires meant for ABS I can use for something else if I want to add anything and not have to run them through the firewall now.

The O2 sensor wiring is not of any concern. I have a PLX wide band wired into the ECU and I'm using Hondata. I'm not running the Evap Purge, AC, power steering, or IACV. I already have a built GSR engine in. I think in the process of adding the wiring for VTEC, running them through the harness with the rest of them, I probably nicked a wire or two because I used a coat hanger to fish the wires through. Or it could have been an existing problem because it did something similar when it died before I swapped the motor. Not the smartest idea, I should have tried harder to get the engine running before pulling it so I could sell it hole, and should have poked a hole through the grommet and ran the new wires separate.