To check fuel pump relay
Check fuel pump fuse.
Should be able to hear/feel the fuel pump relay click when the ignition switch is turn to the "on" position. Connect a test light to the fuel pump power wire at the fuel pump connector (at the tank). Turn the key to the "on" position. Does the test light illuminate?
If so, the relay is working.
If not, remove relay and check for power at relay socket.
If power is present, with a test light still connected to the fuel pump power wire at the fuel pump connector (at the tank), temporarily connect a fused jumper between terminals 87 and 30 of the relay socket. If the test light at the fuel pump connector comes on replace relay.
Checking electric fuel pump operation
Verify that the pump doesn't work (listen for it at the tank as an assistant turns the ignition switch on, he/she should close the door and put on the seat belt to eliminate all the bells when the ignition switch is turned on so that you can hear better---do not crank the vehicle), it should run for about 2 seconds. If you don't hear it running, tap on the tank (within the 2 second run time), sometimes this will get it going.
If it still doesn't work, check fuel pump fuse and relay (should be able to feel/hear the relay click when the ignition switch is turned on. Replace any faulty parts found. If everything checks out so far,
Disconnect the wiring connector at the fuel pump and use a test light to check it for voltage when the ignition switch in turned on. If power is there and yet the pump doesn't work the pump is bad.
Saturday, December 15th, 2012 AT 5:44 PM