11
Test Procedures
TROUBLESHOOTING AND ELECTRICAL
SYSTEM: GASOLINE VEHICLES
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 15-15.
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 11-32.
TEST PROCEDURE 31 – Fuel Gauge
See General Warnings, Section 1, Page 1-2.
1
2
6
4
7
1. Black(Jumper Wire From 6) 2. Blue 4. Orange 6. Black 7. White
480
Figure 11-27
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.
4.
Set a multimeter to 20 volts DC and place the red (+) probe on the positive (+) post of the battery. Place the black
(–) probe on the negative (–) post of the battery. Record the voltage reading.
5.
Set a multimeter to 20 volts DC and place the red (+) probe on the (2) terminal of the fuel gauge/hour meter
where the blue wire (w25) is connected. Place the black (–) probe on the (1) terminal of the fuel gauge/hour meter
with the black wire (w22)
6.
Turn the key switch ON. The voltage reading should be the same as the battery voltage reading recorded earlier.
If not, check the continuity of the blue and black wires
Page 11-32
2013 Carryall 295/XRT 1550 Maintenance and Service Manual
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