Measure the resistance of the sensor from its terminal to ground. You should expect to find around perhaps 500 ohms. The exact value isn't critical. What's critical is you have something and it's not open.
If you find an open circuit, you either have the switch for use with a dash warning light, not a gauge, or you used teflon tape on the threads to provide a better seal. That tape will insulate the ground and prevent a solid connection.
Thursday, July 30th, 2015 AT 4:41 PM