Fuel Pump: Testing and Inspection

NOTE: The following test assumes that the fuel pump relay is operating correctly. Be sure that this is the case before proceeding. Testing and Inspection
1. Raise the vehicle on a hoist.
2. Remove electrical connector at fuel pump.
3. Inspect the connector for corroded, damaged or spread terminals. Clean, repair or replace the connector as needed.
4. Measure the voltage between the dark green/black wire of the fuel pump connector and ground.
^ If voltage is over 10V go to step 6.
^ If voltage is less than 10V repair open in wiring between fuel pump relay terminal 87 and the fuel pump connector, (dark green/black wire), and test operation.
6. Measure the resistance between the black wire of the fuel pump connector and ground.
^ If the resistance is less than 5 ohms replace the fuel pump and filter sock assembly.
^ If the resistance is 5 ohms or greater repair open in black wire or open in ground circuit due to a bad connection, (body ground is connected under the driver's seat).