Was this the procedure you used to check the fuel pump relay?

To troubleshoot a fuel pump relay, start by pulling the relay out of its socket. Use a circuit tester and check the pins in the socket for power with the ignition key off. There should be one pin that has power direct from the battery. If not, check the fuse and make sure that there is power to the fuse. If not, look for the main wire in the fuse block to be loose or open to the fuse. If the fuse is okay and the relay has power to the one pin, turn the ignition key on.

Check to see if there is power to two terminals now. This will require someone else to help because the computer will shut the power off to the relay in 2 seconds if it does not sense the engine starting. This is so that if the switch is turned on, the fuel pump does not keep running. In an accident, the pump will also shut off when the engine dies. Have someone turn the key on and off with 5-second delays while the pins are checked for power to a second terminal. If there is no power, then there is a problem with the line to the ignition switch or a security problem.



This is a problem with the key recognition or if the security system is engaged. If there was power to the second terminal, check the relay with two jumper wires. Put one wire from the positive battery terminal to the relay battery terminal. If this terminal can't be read, put it to any terminal. It won't hurt anything. Run the next lead from the negative terminal of the battery to the relay. With the positive lead attached to a pin on the relay, touch the negative lead to the other terminals. Listen for the relay to click when activated. If it does not click, move the positive lead to a different terminal and try again. If the relay will not click and activate, the relay is bad.

If the relay clicks, then the problem is elsewhere. Use a volt and ohmmeter for the next test. Put the meter on ohms. Remember which terminals have power because to check those terminals with an ohmmeter would ruin the ohmmeter. Look for the terminals without power. Check them for a good ground. If there is no good ground, take the fuse block loose and look under the fuse block for a loose wire or burnt wire. Cut the ground wire and make a new ground wire to the chassis.

If there was a good ground, then insert the relay back in and have someone turn the key on and off and the relay should click. If not, then the computer is at fault. If it clicks, then pull the electrical connector loose for the fuel pump located right behind the fuel tank. Have someone turn the key on and off again while checking for power at the fuel pump. If there is no power, there is an open (bad wire) in the wire leading to the fuel pump. If there is power, the fuel pump is bad.



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