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18
Test Procedures
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FLOAT POSITION
Lower position (tank empty)
Center position (tank half full)
Upper position (tank full)
5.1.
If the readings are within the specifications listed above, the fuel level sending unit is working properly.
5.2.
If the readings are incorrect, the fuel level sending unit has failed and the fuel pump module must be
replaced.
5.3.
If the readings are correct and the fuel gauge does not function correctly, go to the next steps. Leave the
battery disconnected while checking continuity.
5.3.1.
Check the continuity of the orange/black wire from the fuel level sending unit to the purple wire on
the fuel gauge/hour meter.
5.3.2.
Check the continuity of the red/white wire from the fuel gauge/hour meter to the brown/white wire on
the key switch.
5.3.3.
Check the continuity of the black ground wire at the fuel level sending unit.
5.3.4.
Check the continuity of the black ground wires at the fuel gauge/hour meter.
6.
If the readings are correct according to the position of the float, but give an incorrect reading on the fuel
gauge/hour meter, test the fuel gauge/hour meter.
Page 18-34
2019 Carryall 500 and 700 Maintenance and Service Manual
TROUBLESHOOTING AND ELECTRICAL
RESISTANCE READING
250 ohms (±10)
141 ohms (±8)
33.3 ohms (±6)
SYSTEM: GASOLINE VEHICLES
FUEL GAUGE READINGS
Empty
Half full
Full
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Table of Contents
Troubleshooting
