Oil Pressure Gauges Only Working in Engine Rooms

[adt2]

Centered under the stb exhaust manifold.

The top oil hose to your turbo comes off of the same block.
You can follow this hose down to your senders.

These?IMG_9807.jpg

[Captain Ralph]

These?Attachment 72556

That's water temp alarm or sender.
Look under the exhaust manifold.

[adt2]

That's water temp alarm or sender. Look under the exhaust manifold.

How about this one?

[SKYCHENEY]

You found it. Engine oil Pressure

[Captain Ralph]

How about this one?

Circled is the Hobbs Switch. Low oil pressure alarm. The one below it should be the gauge sender.

[Captain Ralph]

The funny things that come in my dreams,, Has your oil pressure ever worked? That sender in your picture did not look original.

[adt2]

Circled is the Hobbs Switch. Low oil pressure alarm. The one below it should be the gauge sender.

So the big fat one with the single red wire is the target, correct?

Assuming I've identified the correct thing, is there any reason it should be run through the ships service panel in that engine room? I've been tracing the wire backwards from the helm and it sure looks to me like it's wired into the battery switch panel down in the E.R. It's possible I've got the wires mixed up, though - I ran out of energy before I could put a tester/toner on it to be sure.

[adt2]

The funny things that come in my dreams,, Has your oil pressure ever worked? That sender in your picture did not look original.

Yes, the gauges at both helms worked - albeit intermittently - until a few weeks ago.

[adt2]

While doing some troubleshooting this morning I discovered that the starboard (non-functional side) gauge has 0v when the ignition is on (port is getting 13.3v), which seems like a pretty big clue. I don't know what it means but I know it matters lol.

[Captain Ralph]

While doing some troubleshooting this morning I discovered that the starboard (non-functional side) gauge has 0v when the ignition is on (port is getting 13.3v), which seems like a pretty big clue. I don't know what it means but I know it matters lol.

I remember some 32Vdc boats using a DCv to DCv converter for the 12Vdc gauges. Hidden under the lower helm.