1985 C20 6.2L Diesel has a problem with the oil pressure gauge

[1985 C20]

I am having a problem with the oil pressure gauge on my truck. I had the sender unit replaced several years ago and now it stopped working. I checked the sender with a ohm meter and it seems like it is working okay. I have removed the instrument panel and I am checking out the wiring at this point.

Does anyone have a wiring diagram for the oil pressure system?

 

[1985 C20]

Update--I guess no one has a electrical diagram for my oil pressure gauge?

Not a problem. I have fixed the problem that I had and now I will let you all know had I fixed it.

I removed the dashboard & I started checking out all of the wires etc. I used a omh meter to check all of the circuits first and I found two of the three wires that go to the oil pressure gauge were rusted so bad that they were not connecting to the gauge. The back of the dashboard had a lot of corrosion. So I removed all of the little retaining clips on the printed circuits one by one. Cleaned off the rust and put each one back in its place.

Now the oil pressure gauge works fine.