TROUBLESHOOTING
Test Procedures
2000 FE290 Gasoline Vehicle Maintenance and Service Supplement Page 11-35
11
3.3. If the reading is zero, there may be NO continuity across the large posts of the solenoid. See Test
Procedure 6, Page 11-23.
4. If all of the test results are good and the voltage reading is zero, there may be a broken or damaged 6
gauge white wire from the solenoid to the starter/generator. See Test Procedure 8 – Starter/
Generator (Starter Function), Page 11-25.
TEST PROCEDURE 25 – FUEL LEVEL SENDING UNIT
Read DANGER and WARNING on page 11-1.
1. Turn the key switch to the OFF position, put the Forward/Reverse handle in the NEUTRAL position,
disconnect the battery, negative (–) cable first, and chock the wheels.
2. Disconnect the orange wire from the center post of the fuel level sending unit.
3. With a multimeter set to 2 k
Ω
(ohms), place the red (+) probe of the multimeter on the center post of the
sending unit. Place the black (–) probe on the ground connection of the sending unit (Figure 11-43,
Page 11-36).
4. The following resistance readings (in ohms) should be obtained depending on the position of the float
inside the fuel tank. The resistance reading will vary according to the exact position of the float. The
chart below may be used as a guideline to determine if the fuel level sending unit is operating correctly.
Make sure the float is at the surface of the fuel in the tank.
5. If the readings are within the specifications listed above, the fuel level sending unit is working properly.
If the readings are incorrect, the fuel level sending unit has failed and the fuel tank must be replaced.
See Fuel Tank Removal in Section 14, page 14-23.
6. If the readings are correct and the fuel gauge does not function correctly, check the continuity of the
orange wire from the fuel level sending unit to the fuel/hour gauge. Leave the battery disconnected
while checking continuity. Also check the continuity of the blue wire from the fuel/hour gauge to the key
switch, and the black ground wires at the fuel level sending unit and at the fuel/hour gauge. See Fuel/
Hour Gauge Removal in Section 12, page 12-21.
7. If the readings are correct according to the position of the float, but give an incorrect reading on the
fuel/hour gauge, test the fuel/hour gauge. See Test Procedure 26 – Fuel Gauge on page 11-36.
• THE VOLTAGE READING LISTED IS FOR ELECTROLYTE AT 70 °F (21 °C). AT LOWER
ELECTROLYTE TEMPERATURES THE VOLTAGE READING WILL BE LOWER.
• TO AVOID THE POSSIBILITY OF FIRE OR EXPLOSION, MAKE SURE THE FUEL TANK CAP IS
SECURELY IN PLACE WHILE PERFORMING THIS TEST PROCEDURE.
FLOAT POSITION
RESISTANCE READING
FUEL GAUGE READINGS
Lower Position (Tank Empty)
240 ± 20
Ω
(ohms)
Empty
Center Position
(Tank Half Full)
120 ± 20
Ω
(ohms)
Half Full
Upper Position (Tank Full)
60 ± 20
Ω
(ohms)
Full
NOTE
WARNING
