GASOLINE VEHICLE - TROUBLESHOOTING
AND ELECTRICAL SYSTEM
Test Procedures
18
TEST PROCEDURE 19 – Fuel Pump
See General Warnings on page 1-1.
WARNING
• To avoid the possibility of fire or explosion, make sure the fuel tank cap is securely in place while
performing this test procedure.
NOTE:
This is a voltage and resistance test.
Voltage to Fuel Pump
1.
If necessary, see Testing Basics.
2.
Check the 10 amp fuse in the fuel pump circuit.
2.1.
If the 10 amp fuse is bad, replace the fuse.
2.2.
If the 10 amp fuse is good, go to the next step.
3.
Disconnect the fuel pump connector from the top of the fuel pump module.
4.
Set the Maintenance/Operate switch to MAINTENANCE.
5.
Put chocks against the wheels.
6.
While the engine is running, check for battery voltage between ground and the pin 5 of the fuel pump connector.
Pin
Wire Color
Description
1
Open
Open
2
Orange/Black
Sending Unit Positive (+)
3
Black
Sending Unit Negative (-)
4
Black/White
Fuel Pump Negative (-)
5
Red/White
Fuel Pump Positive (+)
Figure 18-17
Fuel Pump Connector
6.1.
If there is no voltage, check for battery voltage at the red wire of the fuel pump relay while the engine
is running.
6.1.1.
If there is battery voltage, replace the fuel pump relay.
6.1.2.
If there is no battery voltage, check the key switch.
6.2.
If there is voltage, check for battery voltage at the black/white wire of the fuel pump relay while the engine
is running.
6.2.1.
If there is no voltage, replace the fuel pump relay.
2021 Carryall 300 Maintenance and Service Manual
Page 18-31
Summary of Contents for Carryall 300 2021
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