What can cause the temperature gauge to fluctuate in your Dodge Ram 1500?
There are several things that can cause your 2001 Ford F2 50 outside temperature gauge to quit working. The most common cause is a malfunctioning outside temperature sensor. Where is the temperature gauge sending unit on a 1999 dodge ram 1500?
How does the temperature gauge work on a car?
The temperature gauge reading starts out as a reference voltage that is sent to the coolant temperature sensor. This sensor is nothing more than a thermistor — a variable resistor that changes resistance with temperature changes. As the coolant temperature rises or falls, the resistance of the sensor changes as well.
What are the symptoms of a bad coolant temperature sensor?
Symptoms of a Bad or Failing Coolant Temperature Switch (Sensor) 1 1. Poor fuel economy. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. If the coolant 2 2. Black smoke from engine. 3 3. Overheating engine. 4 4. Check Engine Light comes on.
How can I tell if my temperature gauge is inoperative?
To diagnose an inoperative temperature gauge, you’ll need to test the coolant temperature sensor and the wiring for that circuit. You should have a service or repair manual written for your specific vehicle prior to attempting these tests. You will need to drain and fill the cooling system as well as test specifically colored wires.
The temperature gauge reading starts out as a reference voltage that is sent to the coolant temperature sensor. This sensor is nothing more than a thermistor — a variable resistor that changes resistance with temperature changes. As the coolant temperature rises or falls, the resistance of the sensor changes as well.
To diagnose an inoperative temperature gauge, you’ll need to test the coolant temperature sensor and the wiring for that circuit. You should have a service or repair manual written for your specific vehicle prior to attempting these tests. You will need to drain and fill the cooling system as well as test specifically colored wires.
What happens to the coolant sensor when the temperature rises?
As the coolant temperature rises or falls, the resistance of the sensor changes as well. On most vehicles, the resistance of the sensor decreases as the temperature increases. At low engine temperatures, almost all of the reference voltage is dropped as the current passes through the sensor,…
Where is the temperature sensor on a car?
The location of the sensor varies depending on what year, make and model of vehicle you are working on. It is commonly found threaded into the engine block, thermostat housing, cylinder head or upper intake manifold. Check for reference voltage to the sensor. Disconnect the wiring harness from the sensor. It may have two or three wires.