Engine warning light

Gregger said:

That's exactly what I thought but when I took a look at the prints again I noticed that the sending unit appears to be open, not closed at rest, exactly the opposite to what I was thinking. If it's open at rest that would indicate the contacts close when they see oil pressure??? What do you think???? Look at this circuit. The sending unit is #20. I would need to put an ohm meter on it to see what the orientation of the sender is to confirm the logic around the idiot light activation. If it is like this, then some of my comments in post 47 might be wrong.

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Kevin frazier said:

Touring diagram?

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Gregger said:

Fellows, doesn't the oil pressure sending unit simply provide a ground for the idiot light in the dash (Not sure here)? If so here are some suggestions;
1. A defective sensor could turn the light on. Replace or test it with an ohm meter. If it is giving you continuity while running or when tapping it (assuming you have good engine oil pressure) replace it. The spring inside could be broken or contacts partially fused.
2. A loose wire connection to the sending unit wouldn't turn the light on.
3. A grounded wire (insulation rubbed through for example) could turn light on intermittently. Also if the wire fell off the sending unit or was broken and was touching the frame could turn it on.
4. Moisture in one of the connectors (ECM, dash, etc) could ground the circuit intermittently or provide a short to another circuit through the moisture.

Just trying to think outside the box. I'm not sure from the prints if the idiot light actually grounds through the sending unit or if the sending unit tells the ECM to turn the light on....

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TURBO200R4 said:

The oil sending is at the rear of engine just below the valve cover at right side of engine.
I think a screw with phillips head on the wire. Be very carefull when tighting. Make sure u check oil tank is staying full while running and revving.
There r ways of checking the wires. Wire checking may be complicated and best done after changing sender.
Any pieces u can leave off in order to disconect wire would be good.
Reprase in order to check wires
The wire has to come off sensor

I dought if anyone has experience with the code u have it might just disappear when u fix the sendor

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Chip said:

Thanks much. I appreciate your help. I’ll check it either Thursday or Friday.

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