Fuel & Temperature Gauge
- Using a variable resistance tester (J-24538 or equivalent), attach one lead to fuel tank sending unit and other lead to sending unit ground wire. Move float arm and mark arm location at each of the appropriate resistance values.
- Disconnect sending wire from sending unit. Connect one lead of tester to sending wire and other lead to ground. Turn ignition to "ON" position. Adjust tester to known ohm values and observe gauge indication at each ohm setting.NOTE: Fuel and temperature gauge indications may vary width of needles at any specific resistance value. Preceding test applies to both gauges.