2G stock engine temp gauge stopped working

[RocCitySlayer]

What could cause a stock engine temp gauge to stop working? It doesnt work on any of the 2 clusters I have. I changed the theromstat lastnight and it didnt change anything

 

[96' Eclipse GS]

A possible wiring issue has arose and/or your gauge unit, NOT your coolant sensor stop working. It is a possibly the gauge itself is no longer functional.

 

[RocCitySlayer]

A possible wiring issue has arose and/or your coolant sensor stop working. It is a possibly the gauge itself is no longer functional.

On one of the clusters the needle doesnt budge, but on the other one it moves slightly when i turn on the ignition but stays below cold.

 

[JFatch1890]

Check by your coolant temp sensor for a broken wire same thing happened to me a few days ago.

 

[RocCitySlayer]

Check by your coolant temp sensor for a broken wire same thing happened to me a few days ago.

Where would that wire be located?

Found out that the little red wire going to the connector was broke. Atleast I know that my thermostat is brand new

 

[SquatTheJerk]

There are 2 connectors going into the housing... one is a double connector and the other is a single wire connector on the bottom. Which is the one to the temp gauge?

 

[shinzon]

There are 2 connectors going into the housing... one is a double connector and the other is a single wire connector on the bottom. Which is the one to the temp gauge?

The double-wire sender is the coolant temperature sensor for the ECU. The single wire sender is for the gauge in the cluster.

 

[motomattx]

Ground the single wire terminal to something metal and see if the gauge inside the car pegs out, if it doesnt its not the sensor.

 

[DSM1G90]

A little help on this end also:

My Temp gauge is doing a similar, but in reverse.

It works fine, but will suddenly peg to the hot for a few, then head to where it usually rests, which is right before the half mark.

Now to me, it's a classic example of a stuck T-stat, or worse a blown HG.

Yet, T-stat is working normally and no probs with a blown HG.

Now, here is the weird one: after a full cool down from going to work, when I hit the key, the gauge will peg up to the half with coolant cold, then flips to show that the coolant is cold then rises normally.

There are times, the needle bounces from normal temp to full hot, ten back down and then will rest there for the duration of the drive.

Has a new Temp Sensor, new Sending Unit. I Pulled T-stat out to check and it opens great in a pot of boiling water. Coolant level is where it should be in the neck of the radiator and overflow is at its level.
I disconnected the sending wire to touch ground and no response from the gauge to show full peg to hot.

Wonder if I have a goofy speedo cluster that isn't doing its thing.

thx for the help - DSM