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One apex at a time
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O2 wiring
This is for my MS project in my 924s
Anyone know what wires go to what at the plug where the o2 sensor plugs in. I know what the three wires do I need to ID them for wiring purposes. The three wires are power ground and the signal wire. I even know what there colors are However getting in to the wiring harness at the back of the plug is all but impossible I was able to figure out the power lead but the two other ones did not tell me anything definitive by continuity to ground or by voltage. Here is a photo of the connector.  The pin on the upper right is the power supply for the sensor heater. The other two I can not figure out from Ohms or voltage testing. Ultimately I will probably have to take the DME out and get it by the continuity to the DME plug but at the moment I really don't want to do that. |
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07-10-2011, 06:46 AM
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Redline Racer
Join Date: Jan 2007
Posts: 2,444
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The sensor signal grounds through the exhaust system. IIRC the two pins are positive and negative for the heater and the single contact is the sensor signal. Two white wires on the sensor wire are the heater and the black one is for the signal.
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1987 silver 924S made it to 225k mi! Sent to the big garage in the sky |
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07-10-2011, 08:10 PM
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One apex at a time
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That is exactly the info I was looking for!!!!
Thanks!!! If anyone has a dead O2 sensor I could use just the plug with a couple inches of wire attached. I am trying to keep my MS project as plug and play as possible. |
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07-11-2011, 05:11 AM
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