Fuel Sender

To test sender on or off the vehicle, connect one lead of ohmmeter to ground terminal of sender unit (or sender housing on single terminal units), and other lead to resistor terminal of sender unit. With tank empty (on vehicle) or float rod against "EMPTY" stop (off vehicle), ohmmeter should read between 60 and 86 ohms. Slowly fill tank with fuel (on vehicle), or move float rod to "FULL" stop (off vehicle). Resistance reading should decrease smoothly from between 60 and 86 ohms, to between 8 and 12 ohms when tank is full or float rod contacts "FULL" stop. Slowly drain tank or return float to empty. Again resistance change should be smooth and return to previously specified resistance. If resistance specifications are not met at either position, or if resistance jumped between readings, replace sending unit.