TESTING
Fuel Pump Relay
1. Turn the ignition OFF .
2. Remove the relay.
3. Locate the two terminals on the relay, which are connected to the coil windings. Check the relay coil for continuity. Connect the common meter lead to terminal 85 and positive meter lead to terminal 86. There should be continuity. If not, replace the relay.
Fuel Pump
1. Turn the ignition key OFF for ten seconds.
2. Turn the ignition key to the ON position but do not start the engine.
3. You should here the fuel pump operate for two seconds (a light electrical humming sound).
4. Apply a 12 volt fused jumper wire to the fuel pump prime (test) connector. This should be located in the driver's side of the engine compartment. The fuel pump should operate.
5. If the fuel pump does operate, remove and test the relay. If the relay is defective, replace the relay and repeat the test.
6. If the relay is operating properly, connect a grounded test light to the fuel pump relay control wire (green with white stripe) at the relay. Turn the ignition switch to the ON position. The test light should illuminate for two seconds and go out. If the test light does not illuminate, check the relay control wire for continuity and repair as necessary, then repeat the test.
7. Connect a grounded test light to the feed wire (orange) at the relay and turn the ignition key ON . The test light should illuminate. If the light does not illuminate, test feed wire for continuity and the fuse in the underhood fuse relay center. Repair as necessary and repeat the test.
8. If the fuel pump is still not functioning, connect a fused jumper wire between the feed (orange) wire and the fuel pump motor (gray) wire at the relay. The pump should operate.
9. If the pump does not operate, check the fuel pump motor wire for continuity and repair as necessary.
10. If the pump will still not operate, replace the pump.
11. If the pump does operate, start the vehicle and remove the relay. The vehicle should continue to run. If the vehicle stalls, check the fuel pump/oil pressure switch and its wiring. Repair as necessary and repeat the test.