If you do a search of the forums, you will find this discussed several times. That said...
A varible resistor (0-200 ohms) is a very good 'tool' for testing both gas and electric temp gauges. Temp. gauge test...remove wire from sensor. Hook test clips from varible res. to good ground and sensor wire, Turn key on and move res. shaft (make sure you have one clip to the resistor post that varies the resistance). Watch gauge, it should move between cold to hot. BTW, as I see it, your resistance readings don't look correct.
Gas gauge test. With VOM set to DC volt, 0-25 volts or so, put one lead on the gauge +12 volt post. The other lead to ground. Switch key to run or accessory position. You should read 12 volts. If you don't, your wiring is incorrect. Good luck
