Help Identify - wires cooked

[dubdub]

Today, while doing an unrelated project, I noticed that a number of my wires had cooked and got really brittle.

1990 325ix - what are the wires that run under the exhaust manifold? One 3-wire line goes to the bottom of my oil pan. Oil level sensor? The other is a one-wire line that runs up to engine block by the AC. What is that? My O2 sensor is fine.

The wires have just gotten crunchy hard over the years and the oil level wires have completely crumbled and the wires have broken. The other one-wire line is just as bad, but hasn't broken yet... but it will.

How to I go about replacing these wires? Are there special wires for high heat applications? What about connections? How best to seal?

[Chrisbike]

Yeah the one that goes to your pan is oil level sensor and the one by your ac compression is most likely the crank position sensor. It goes up to the two connectors by the c01 plug. Idk about the wire on the oil level if it's damaged before the connection. (I'd just leave it and check your oil). As for the cps wire, just replace it. I don't think that there's any special wire just a heat shrink to protect the wire.

[Seawolf]

Or the single wire could be the oil pressure sensor. Follow it down, if it plugs into a really awkward spot in the oil pan just ahead of the oil level sensor then it's oil pressure.

[dubdub]

Does anyone know the order of wires for the oil level sensor? The wire harness side of the connector is gone.

[Seawolf]

Take a look at http://wedophones.com/Manuals/BMW/19...g%20Manual.pdf

Page 6216-3 Active Check Control, bottom left corner shows the oil level sensor.

If I have time I'll take a look at my iX physical connections later today.

[dubdub]

That would be great! Thank you! I was looking at it under the car, and I just couldn't figure out how to discern what wire went where, now that the vehicle side of the connection is gone. I just have three corroded and rotted wires. My hope is to just peal way back in the line and hopefully find a place that the wires have not been degraded to the point that they are non recognizable any more... cut there and then run each down to the sensor, and just fashion a way to connect them.

I have a hard copy of the manual... but I get over my head quickly. Thank you for marking right to the correct spot!

[PKile]

You can always go to a Pick and Pull junkyard and cut a good section of the harness off a junker, then splice it to your harness. I had to do that with my oil pressure sender wire and the connector for the windshield washer fluid level sender. Seems those check control sender connectors (washer fluid, brake fluid, coolant) get intermittent after awhile.