A broken temperature gauge can lead to expensive vehicle repairs. It is very important to test gauges to ensure they work properly, because an inaccurate reading can cause serious damage to the vehicle’s engine or to the driver. Most gauges in today’s cars run on an electrical system. With a few simple tests, you can determine whether there is any damage to your vehicle’s temperature gauge.

Step 1

Unplug the temperature gauge from the sending unit. This is usually located to the right of the engine.