Hey guys. I have my buddies 1996 379 in the shop and I was going to look at fixing a few gauges that don't work (fuel level, oil temp, pryo) I was trying to locate the oil temp sensor and I can't seem to find it. Nothing in bottom of pan. Have power going to the gauge on the white wires the gauge doesn't move at all.
It won't have a cat oem temp sensor. It should have a Peterbuilt installed sensor in the pan. If the wires are there someone took it out.
Yeah peterbilt used a 1 wire sensor engine oil temp sensor on a cat engine that vintage should have been low in the pan on the driver side
Peterbilt was good about there wiring harness' if there is a gauge in the dash then the wiring harness for the sensor should be in the engine harness. On my 1993 379 with a Cat 3406C the wire # for my oil temp sensor is 282 on the engine harness
I got a wiring diagram. From the cab to the engine harness it isn't labeled I think I found it, sensor will be here tomorrow. I think I found the wire so tomorrow ill see if it's the right one
I think someone removed it and took out the sensor cause the wire has been used and has a joint on it. Thanks for your help!
You can test the wire by grounding it out and looking to see if it pegs the gauge. Might pay to check with a test light first to make sure it isn't another wire that is hot.
