Hey all

1999 Civic Dx 5 speed D16Y7

I have an Ex cluster and I noticed today the temperature gauge wasnt working. I looked in the fuse box and the under hood fuse box and I couldn't find any fuses for the coolant gauge.

How would I go about fixing this issue? Im selling the car in 3 days and im also doing a 1400 mi drive back to CA and I really need my temp. I do have 2 extra temp sensors (they go on the lower coolant hose housing on the block amirite?) and I could swap those in when I get a 24mm socket.


EDIT: I swapped in the Dx cluster and its still doing the same thing.

 

I guess thats the ECT switch.

 

Check the ECT gauge sending unit, in your pic above. There is a test method with a multi meter, search for it, I can not remember off the top of my head.

 

Today I replaced the ECT Gauge Sending Unit and Engine Coolant Temperature Sensor and nothing.

I still havent replaced the ECT switch, could that also be a culprit?