how do i test a fuel relay?

Answer 1

heres an easy test. turn anything in the car that makes noise off(radio,a/c fan,etc.)turn the ignition switch on & listen carefully.in 2 seconds u should hear a click from the relay.if it doesnt click, its shot

Answer 2

Usually when I am in a shop I replace the suspect relay with a known good part. But, you can manually do what the relay does with a jumper wire. Most relays have the electrical diagram printed on it with numbers representing the pins. Figure out which two pins connect to operate the circuit and cut a small piece of wire and connect the two together. If the electrical circuit operates normally it will most likely be the relay.Make sure you check for power in your control circuit before you damn the relay.

Answer 3

Check terminals of fuel pump relay for battery voltage. If battery voltage is not present, check circuit for short or open circuit.
If battery voltage is present, remove relay and attach ohmmeter probe to relay box terminal . Attach other probe to ground. Continuity should be present while cranking engine.
If continuity is not present, check for continuity between terminal of fuel pump relay and terminal of ECU connector. If continuity is present, circuit is okay but ECU is not switching to ground. Replace ECU and install fuel pump relay.
If fuel pump will not operate, turn ignition switch off, then on. Ensure battery voltage is present at fuel pump relay for about 5 seconds after ignition is switched on. If battery voltage is not present, replace fuel pump relay. If battery voltage is present, check voltage supply and ground circuit of fuel pump. If fuel pump wiring is okay, replace fuel pump.

Answer 4

a follow up on pbherbie all relays according to the diagram are pins 30 and 87.