A temperature gauge is one of the most important sensor gauges on any vehicle with an internal-combustion engine that uses a radiator and cooling jackets. Engine temperature directly affects combustion and moving internal parts. Without a temperature gauge, the engine would be subject to various modes of heat without the operator’s knowledge, and this could lead to bearing failure and engine seizure. A vehicle owner can wire a temperature gauge in his or her vehicle in a driveway or garage.

Step 1

Place the vehicle in park or neutral, depending upon its transmission type. Set the emergency brake. Raise the hood and disconnect the negative battery cable with a socket. Refer to your owner’s manual for the location of your existing temperature sensor wire. Some are connected to the top of the thermostat housing, attached to a sensor probe. Other wires can be found in the side of the engine block, where the sensor probe screws into a mounting flange. Remember the location.