TROUBLESHOOTING AND ELECTRICAL
SYSTEM: GASOLINE VEHICLES
Test Procedures
11
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.
_
FLOAT POSITION
RESISTANCE READING
FUEL GAUGE READINGS
Lower position (tank empty)
240 ±20 ohms
Empty
Center position (tank half full)
120 ±20 ohms
Half full
Upper position (tank full)
60 ±20 ohms
Full
5.
If the readings are within the specifications listed in the preceding table, 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 on page 15-16.
6.
If the readings are correct and the fuel gauge does not function correctly, leave the battery disconnected and
check the continuity of the following:
– Orange wire (w104) from the fuel level sending unit to the fuel gauge/hour meter.
– Blue wire (w25) and purple wire (w47) from the fuel gauge/hour meter to the key switch.
– Black ground wires at the fuel level sending unit (w106) and at the fuel gauge/hour meter (w22).
Gauge/Hour Meter Removal on page 13-7.
7.
If the readings are correct according to the position of the float, but the reading on the fuel gauge/hour meter is
incorrect, test the fuel gauge/hour meter.
See Test Procedure 31 – Fuel Gauge on page 11-35.
TEST PROCEDURE 31 – Fuel Gauge
See General Warnings, Section 1, Page 1-2.
1. Black(Jumper Wire From 6) 2. Blue 4. Orange 6. Black 7. White
480
Figure 11-28
Fuel Gauge/Hour Meter
NOTE:
Keep the battery connected during this test procedure.
1.
Disable the vehicle.
See Disabling the Vehicle on page 1-3.
2.
Raise the hood.
3.
Disconnect the orange wire (w104) from the fuel gauge/hour meter.
2016 Carryall 1500/1700 and XRT 1550 Maintenance and Service Manual
Page 11-35
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