The coolant temperature gauge operates based on the amount of current flowing to ground via the sender at the engine. Inside the sender is a thermal contactor, which expands or contracts with ...

Here are two examples of coolant temperature sending units. There are two basic types of sending units: warning light and gauge. Warning light types normally have two pins.

While we briefly touched on how to test gauge sending units in our introduction, ... Scroll through to find the part you need info for, such as a coolant temperature sensor, ...

At left are the sending units for the coolant (water) temperature and oil pressure gauges. The box in between is the Sky Drive GPS unit. GPS speedometers are more accurate and eliminate dealing ...

Ensuring your coolant temperature sensor is functional feels like a no-brainer. Here are a few tell-tale signs that your ECT sensor might be bad. Your check engine light is on ...