WHAT IS CAUSING A COOLANT TEMPERATURE GAUGE MALFUNCTION?
1997 Nissan Hardbody
July, 7, 2012 AT 7:30 PM
The gauge is reading hot quickly and bounces around rapidly. I replaced both of the coolant temp sensor/sending units, nothing changed. I checked the gauge, unplugging it reads cold and grounding it reads hot. The engine is not getting hot, the radiator cap is brand new.
Check/Test the thermostat if okay-could be airlock try bleeding the cooling system and see what happens-let me know
July, 7, 2012 AT 8:03 PM
It was also replaced same time as the coolant temp sensors. Just drove it, the gauge needle move along with any electrical devices, it moves up/down with the blinkers simultaneously, up/down with heater fan on/off, head light also. Must be a ground short, will run a new wire.