Where do these wiring harnesses plug into?

[CJ with a TJ]

So in the course of my day today, replacing a bunch of steering parts and the front track bar, I came across two disconnected wire harnesses. No biggie, I must have pulled them apart, or so I thought....

They do not connect, vehicle drives fine, and I can't find any connections within the radius of either harness. I have no clue where they go.

They both come from the same wiring group, which starts up at the fuel rails, and the last wire terminates on an O2 sensor.

If anyone can tell me where these go, I owe you hugs, beers, or both. Whatever you need.

 

[myjeep3]

Leave them off, drive for a while and scan for codes. If they are important you will get a code eventually.

Or pull the schematics of the circuit next to it, you my find the unplugged ones. Sometimes people add circuits for added things so don't go too crazy if you don't find it. Will get a code if it's important

 

[Lemmy]

Your Jeep doesn’t have AC?

The plugs likely go to AC compressor and pressure switch. Jeep is using the same harness for vehicle with and without AC.

 

[CJ with a TJ]

Your Jeep doesn’t have AC?

The plugs likely go to AC compressor and pressure switch. Jeep is using the same harness for vehicle with and without AC.

These wire harnesses are on the other side of the engine bay, driver's side, on the wiring cluster that goes from the fuel rail to the O2 sensor.

I'm guessing they keep like wiring together, so assuming that it's something fuel related?

Check Engine light has been on for a lonnnng time, code P0455, an EVAP leak code. I'm not sure how long these wires have been disconnected for.

 

[macleanflood]

FYI wiring diagrams are in the resources section.

That's the same place my 97 has O2 and crank position sensor connectors.

Smoke test for evap leaks and putting a screwdriver on the solenoid to listen for rapid clicking when the Jeep is warmed up in open loop.

-Mac

 

[CJ with a TJ]

FYI wiring diagrams are in the resources section.

That's the same place my 97 has O2 and crank position sensor connectors.

Smoke test for evap leaks and putting a screwdriver on the solenoid to listen for rapid clicking when the Jeep is warmed up in open loop.

-Mac

I figured the Resource Section might have it, I've just been running around non stop, and was hoping for a push in the right direction.

I'm going to have to do a little research on the smoke tests, as that's something that I've never done. Always good to add another skill.

Thanks!!!

 

[macleanflood]

I bought a cheap one on Amazon. Prime Days are coming up. Keep an eye out or set up a filter.

-Mac

 

[CJ with a TJ]

Your Jeep doesn’t have AC?

The plugs likely go to AC compressor and pressure switch. Jeep is using the same harness for vehicle with and without AC.

Dude, I think you nailed it!!!