How Do U Check Fuel Pump Relay

It is often found in the fuse box located in the engine bay and. A car s fuel pump relay turns on the fuel pump when the motor runs. Unplug the fuel pump relay but do not break the cover and connecting tabs.

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When a relay is defective it is usually because of a bad coil or bad connection.

How do u check fuel pump relay. Here are some common signs of a faulty fuel pump. If it looks fine check the voltage at the pump itself to make sure the charge that s leaving the fuse gets to the pump. A relay works in a similar way but instead of you reaching into the relay to flip on the internal switch directly you energize a control circuit that connects to a coil inside the relay this happens to the fuel pump relay when you turn the ignition switch to fire up the engine for instance. A fuel pump relay functions primarily to maintain a consistent voltage supply to the fuel pump.

To check both operations remove the relay by pulling it out of its socket. Replacing the fuel pump relay may not fix the problem because the source of the trouble may be the fuel pump. A high pitched sound occurs when the engine starts. The car acts.

Find the fuel pump relay in your vehicle s fuse box. Consult your owner s manual or a service manual to find the location of your fuel pump relay. Before you check your fuel pump find the fuse that corresponds to the pump and pull it out to see if it is broken or burned. The fuel pump relay is an electronic component that is found on virtually all vehicles equipped with an internal combustion engine.

The fuel pump turns on but fuel pressure is low. Acceleration is uneven this is also a sign of a bad fuel filter so have the fuel filter checked first in this case. The main fuse box is usually located underneath the hood near the front of your vehicle but there may be a smaller fuse box under the steering column inside your vehicle as well. Step 2 remove the fuel pump relay.

One is for input voltage one is the ground pin one is the load pin that goes to the fuel pump and. So any faults with it can cause fuel pump issues. Step 3 identify the components. The ignition or powertrain control module pcm usually controls the fuel pump relay.

Place it on a work surface. Generally there are four pins terminals on the fuel pump relay. When switched on the fuel pump relay will provide current to the fuel pump so that it may function. Pull the cover off of the fuse box and look at the diagram printed on it to know where the fuel pump relay is.

If this looks alright then perform a fuel pressure test.