2nd Gen Non-Engine/Transmission guages out

[MKopf]

my oil pressure and temp guage went out! Fuel and volt guages work fine anyone have a clue?

 

[JLandry]

MKopf,



Please add your truck to your profile so we can tell what year and model you're asking about.



Regards,



John L.

 

[MKopf]

Hope that worked my truck is stock have had to replace vp-44, lift pump, and had transmission rebuilt which by the way is when my gauges went out

 

[JLandry]

MKopf,



What do you want to bet there's a direct connection between the work you had done and the oil and temp gauges not working now?



First I'd check to see if the engine oil pressure sensor and the engine coolant sensor are securely plugged into their respective wiring harness connectors. The oil pressure sensor is located on the left side of the engine block above the starter. It's actually a bit hard to see. The engine coolant sensor is on the left front of the cylinder head.



If they're both plugged in properly, then another thing these two sensors share in common is they're both grounded through the ECM (Engine Control Module) through a splice in the engine wiring harness near the ECM, which is in the driver's side of the engine, right in front of the lift pump (assuming it's still in the stock location). You might take a look at the wiring harness around there for anything strange.



However, other critical sensors are also grounded through that same splice, so I'm guessing you'd have more problems if that splice were damaged.



You might also want to check fuse number 17 and 14 in the fuse junction block on the driver's side of the instrument panel (in the cab). They supply power to the instrument cluster. Once you're sure they're both OK, then run a self-test on the instrument cluster as follows:



With the ignition key off, press and hold the trip reset button on the odometer, turn the ignition key to on (don't start the engine) and continue to hold the trip reset button until the instrument cluster enters self-test, then release. At the end of the test if there's a problem, you'll see an error code displayed in the odometer window. If you get an error code, let us know what it is.



If I think of anything else, I'll let you know.



Regards,



John L.

 

[MKopf]

john you just gave me more info than 2 tech's at 2 different dealers could will do those thing's and let you know what I find

 

[MKopf]

OK I'm at work but I had my son run the self check on the cluster he said it checked all the gauges needles went from left to right speedo went to 120 and gave no error codes fuses 14 and 17 were good also. I will check the wires and ground in the morning I have a feeling the transmission guys did something to the wires like you said I sent the computer in and it came back fine so I know the computer is good

 

[MKopf]

OK checked all the plugs all were connected didn't see the ground on the ecm so I brought it to auto store and had them check for codes came up with P1682 and P0122. May just have to take it to cummins NW and have them look at it. What do you think John