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NISTECH »
https://forums.nicoclub.com/nistech-u7581.html
Wed Aug 10, 2005 5:25 pm
There are 2 sensors for coolant. one is the coolant temp sensor for the ECM its 2 wires and usually red or yellow in color. The other one is the coolant temp sender for the gauge in your dash. It is black in color and only a single wire connector. So to answer your question yes your gauge will still work. Now the problem could be as simple as corrosion build up in the connector at the sensor. A good cleaning with battery terminal cleaner or baking soda and water as well as slightly bending the female pins in the connector to tighten it up on the sensor could be all it is. Or you could just have a bad sensor.