I have a 89 crx si and after my car overheated due to a leaky hose the temperature guage stop working. Could it be the thermostat that is causing this? Or just the wirings? No its not the fuses I've checked.

 

Take out the temp sensor for the guage and check the resistance. If good then check it while in a pot of hot water. You should see a change in resistance. Check the wiring too.

BTW there are no individual fuses for sensors.

 

the sensor in question is located under the dist. also.