On my 12v cummins my temp gauge on the dash was not working. So i changed the temperature sensor on the block of the engine. Then I started it up waited a half an hour and nothing still. Does anyone have any ideas or ever had this issue?, thank you for looking and your answers are greatly appreciated.

 

Hi,
Well try a firm tap to the gauge itself. Maybe it's stuck, could also be the gauge itself is toast. Maybe the electrical is broken to the gauge too.
I would trace the wiring to the gauge first after tapping if no go.
Good luck.

 

Thank you, the problem with tracing the wiring is that it goes right into a cluster of wires and is untracable. However I will try what you said. Even if it is toast It would be tough to re-wire it.

 

what year is your truck?i have an89 w/95 Ppump motor,i just(almost)finish a fram up rebuild.my temp gauge was reading near hot w/truck not running.my 89 wire harness has removable in line resistor which went bad.can't find any help or info for the resistance value.you either get false or no reading on gauge.you may have same issue.if you find an answer please forword it to me.i'll do the same,thanks!

 

If the truck was just sitting there idling it's likely it didn't warm up enough to move the gauge.
Go out and drive it.

 

If you figure it out let me know. Sometimes my gauge goes dead....

 

Will update this when truck is back togethor,(working on wiring under dash), i will try starting it and driving it around hopefully the guage will come back to life