Temp Gauge Not Working

[New to GTR]

Hi;

New to the GTR.

Have an 1992 GTR RB26 DETT and temp gauge in the instrument cluster in not registering anything. From what I've read, there are two coolant temp sensors? - one for ECU and one for temp gauge.

Checked ECU temp sensor and resistances are in normal range (according to manual) . Checked the smaller sensor next to it on the coolant housing (single wire sensor) but can't find any specs on normal resistance ranges. Also removed the instrument cluster in off chance there might have been a loose plug or obvious wire disconnect - no such luck.

Not sure how to troubleshoot this one. Are there two sensors - one for ECU , one for temp gauge. Found info on diagnostics in the manual for the ECU coolant temp sensor but how do to troubleshoot temp gauge sensor if it is separate? Curiously, heater doe snot seem to throw much heat either.

[blind_elk]

I think if you ground the wire the goes to the sensor, the gauge should go full-scale. This will confirm the gauge is working.

The problem with the heater is totally separate. Have you checked that a thermostat is installed? Is the top hose of the radiator hot when the engine is up to temperature (been working for more than about 10 minutes)?

[New to GTR]

Thanks, I'll try grounding the sensor wire.

Yeah - heat in cabin was not suspected to be connected to the gauge but might be a symptom of what led us to the gage. Absolutely have heat at top of radiator - kinda started the whole deal. Short version of a long story -> Just got the car this spring and it has taken until now to get it road ready. Finally about to take it to have it tuned when we stumbled upon the temp gage not working (thought car might be running hot) and so here we are trying to get temp gauge functional to be able to get back to original plan<- I'll need to check for the thermostat.

Appreciate the help. I'll advise if gauge works.

I think if you ground the wire the goes to the sensor, the gauge should go full-scale. This will confirm the gauge is working.

The problem with the heater is totally separate. Have you checked that a thermostat is installed? Is the top hose of the radiator hot when the engine is up to temperature (been working for more than about 10 minutes)?

[New to GTR]

Gauge works - anybody know the part # for the temp gauge sensor? 92 GTR RB26DETT

Thanks, I'll try grounding the sensor wire.

Yeah - heat in cabin was not suspected to be connected to the gauge but might be a symptom of what led us to the gage. Absolutely have heat at top of radiator - kinda started the whole deal. Short version of a long story -> Just got the car this spring and it has taken until now to get it road ready. Finally about to take it to have it tuned when we stumbled upon the temp gage not working (thought car might be running hot) and so here we are trying to get temp gauge functional to be able to get back to original plan<- I'll need to check for the thermostat.

Appreciate the help. I'll advise if gauge works.