Loose wire near O2 plug March 27, 2010, 10:40:48 PM 1984 Cougar XR7. I was replacing the O2 sensor and found an extra orange wire in the wire loom at the O2 plug, car side. The three wires that should be, are in the plug, and I cant see any sign of it going in beside another wire. Can anyone let me know where it should go?Scott Quote Selected
Loose wire near O2 plug Reply #1 – March 28, 2010, 09:56:46 AM I never seen the orange wire that far down the harness. It's usually gut off out of the salt and pepper connectors. We discussed a while back and came to the conclusion it wasn't needed. since orange is a ground for the o2 sensors.I grounded mine.You may want to be sure your o2 sensors are grounded on the back of the head to be sure. I will search for the post and post it if i can find it.http://www.foxtbirdcougarforums.com/showthread.php?t=15808&highlight=orange+wire Quote Selected
Loose wire near O2 plug Reply #2 – March 28, 2010, 01:22:17 PM Never thought of searching 'orange wire' seemed too vague! I'll ground it and see if anything changes. The O2 is grounded to the turbo housing.ThanksScott Quote Selected
Loose wire near O2 plug Reply #3 – March 28, 2010, 03:41:36 PM That info was for a 5.0, might be or not the same on 2.3. Quote Selected
Loose wire near O2 plug Reply #4 – March 28, 2010, 04:08:33 PM Quote from: tbirdscott;316230Never thought of searching 'orange wire' seemed too vague! I'll ground it and see if anything changes. The O2 is grounded to the turbo housing.ThanksScottCheck it with a meter and see what you have.An orange/white stripe wire is used for the referance voltage (5 volts) for some of the sensors.If it is the orange wire to pin 49 of the EEC it is the EGO ground and goes "near the EGO sensor" according to the 84 EVTM.The ground side of the sensor is through the threads of the sensor. So the least amount of iron you have to go through to get from the EGO threads to the orange wire the better. Quote Selected
Loose wire near O2 plug Reply #5 – March 29, 2010, 10:09:03 PM Yeah. On my 88 sport 5.0L it was grounded to the back of the engine. Quote Selected
Loose wire near O2 plug Reply #6 – March 29, 2010, 11:57:01 PM No continuity to ground and no power with key on or off. I just left it alone. Scott Quote Selected
Loose wire near O2 plug Reply #7 – March 30, 2010, 04:45:06 PM http://www.foxtbirdcougarforums.com/showthread.php?t=21560&highlight=orange+wire Quote Selected
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