Fuel & Temperature Gauges

Test with a variable resistance tester (J-24538 or equivalent) or extra fuel tank sending unit. If using fuel tank sender unit, attach one ohmmeter lead to 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 or extra sending unit to sending wire and other to ground. Turn ignition to "ON" position. Adjust tester or sender to known ohm values and observe gauge indication at each ohm setting.

TEMPERATURE SENDING UNIT RESISTANCES

FUEL GAUGE SENDING UNIT RESISTANCES

Gauge Needle Position

Ohms

Empty

⁽¹⁾ 61

1/2 Full

Full

⁽¹⁾	"CJ" and Scrambler models 73 ohms.

Fig 1: Testing Temperature Gauge When known resistance is sent to gauge, needle should move to listed position.