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To troubleshoot your car's temperature gauge, you need to know how it works. 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.


General Motors temperature gauge troubleshooting Temperature gauge troubleshooting begins with isolating the problem either to the gauge, sending unit, fuse or wiring. As with any electrical troubleshooting it is best to check all wiring connections are clean, tight and free of corrosion.


So, you have an older car and your temperature gauge isn't working. What do you do? Well, there are really only three parts to it, so follow these steps to figure out that problem!


To Magazine Home Page. Troubleshooting Boat Gauges, Instruments And Meters. By John Payne. Here's what you need to know about the operation, maintenance, and troubleshooting of your boat's gauges and meters.


How can I troubleshoot my electric temperature gauge? Verify Wiring and Common Ground Verify your wiring is good and that the gauge and sender both have a good common ground (ground both to the same place on the chassis).


When troubleshooting and repairing gauges, remember to take the utmost precautions as you will be working with both combustible materials and materials capable of delivering electrical shocks. Keep a watchful eye on yourself and the tanks and gauges.


The gauges pictured here lists the temperature of R12, R22, and R502. Regardless of which refrigerant is being used, the scale designated as PSI is the one used to read system pressures when charging and diagnosing an a/c system.


The problem with my Ford F 150 1994 300 engine with 6 cilinders is that the oil indicator needle started moving up and down until it drops completely.


The most common reason for a coolant temperature gauge not working is a problem with the coolant temperature sensor. Signs of a bad sensor include black smoke in the exhaust, a car using more gas than usual or a car overheating frequently.