Engine gauges

[cct]

Hi all,

Engine gauges in pilothouse all work ok (Oil Press: 85psi, Water Temp: 190F). Up on the flybridge, not so good. Volt meter: ok, Tach: ok. Oil Pressure reads ZERO and water temp reads about 120F.

I did a search on trouble shooting and it only addresses primary gauges / nothing on repeaters. On the back of the gauges, there is nothing connected to any of my "Sender" connectors at the flybridge so they are all repeaters. Grounds all seem good.

I suppose I could swap gauges with those down in the pilothouse but before I do, I'm looking for confirmation that the gauges probably are the culprit or is there something else I should consider? I've read that bad readings (i.e. water temp 120F vs. 190F) is a sign of a bad ground. All my connections look good and they go to a common ground bus bar behind the wheel.

Anyone have ohms readings for what I should see at each of these gauges?

TIA.

[meridian]

Try taking your readings then compare them to the flybridge. To check for a bad ground you need to loosen then retighten all your connectioons. You could also bypass all the ground connections with a long piece of wire that goes to the same ground point of your lower gauges.

[RobS]

I too am thinking it would be easy enough to run wires between the upper and lower gauges to determine if your wire runs and/or connections are the culprit.

[jleonard]

Yes most likely a bad connection (usually the ground) or green wire (read that corrosion).
If it were me, I would run a new known good ground wire from the battery to the gauge (it could be a temporary one to use for troubleshooting only) and then see if that solves the problems.

[cct]

Great! Thanks guys for the advice. It's on my short list of things to do.