Hello I have a 99 Dodge ram 1500 Mag.v8 Just swapped out the motor with a re-manufactured motor, at first the temp. would shoot to H, but the motor was not hot (had oil pressure gauge read normal then) swapped sensors and gauge was normal but now no oil pressure gauge,swapped 2 oil pressure sensors checked pressure manually, reads good but no gauge in cluster. Any advice appreciated thank you!

 

My best guess is you didn't get all the grounds reattached. That or they need to be cleaned.

 

all grounds clean and in place,swapped out a couple more oil sensors, a working oil sensor from another motor of the same model,changed the cluster dont know what else i can do, getting 5v to the sensor but nothing on the gauge and i cant find a wiring diagram anywhere also the compressor wont kick on, also changed the control panel a real head scratcher

 

Ignition on, short the pins on the OPS connector together. Does the gauge move? Do all your other gauges work? You can download a service manual from here, wiring diagrams are in section 8W.

 

tried shorting them and it wouldnt budge, not even a wiggle, thank you for the manual link

 

Time to plug in to the PCM, and see if IT has a clue what oil pressure is.

 

no codes to read on OBD and the automotive diagnostic scanner says oil pressure reads 0, manual gauge says its good

 

Verify continuity on the signal return wire back to the pcm for the oil pressure sensor.