At a loss: oil pressure sending switch

[Jjcord2015]

1999 Jeep Cherokee classic 4.0

I had to replace the oil pressure sending switch last year. The connector was practically melted onto the switch, so cut it off, spliced new connector on and put in new sender from oreillys. Pressure was a constant 50#. No fluctuation at all. Gauge was at zero when connector was unplugged. Bad sender? Didn’t care, I know i was getting oil. Motors fine.

Decided today to exchange sender since it’s under warranty, installed and there’s zero pressure in the gauge. Ok, maybe the connection splice job was bad, so bought a new connector, no change, zero pressure. Bought another sender thinking I bought 2 bad ones in a row. Still no pressure on gauge. I’m getting oil up top, have verified with my eyes.

Is there a fuse somewhere for this thing?

Oh and it’s not clogged. Fired it up without sender in and got a nice little spray of oil on the rear of engine.

Im out of ideas.


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[sidewaysstarion]

Did you flip the wires to the connector around when you spliced it?

 

[Jjcord2015]

Did you flip the wires to the connector around when you spliced it?

I don’t think so. Can someone post a photo of the connector so I can verify I have the wires correct? That would help immensely.


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[sidewaysstarion]

Pin 1 is Orange
Pin 2 is Gray with a Yellow Stripe
Pin 3 is Brown with a Yellow Stripe

The view in the picture for the pin orientation is looking into the connector from the sensor side.

 

[Jjcord2015]

Omg thanks so much. Had the brown and grey switched around. Works now.

Don’t drink and do wiring kids.

Thanks again.


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