How To Check If A Fuel Pump Relay Is Good

One is for input voltage one is the ground pin one is the load pin that goes to the fuel pump and.

How to check if a fuel pump relay is good. A faulty relay may allow the vehicle to be. Generally there are four pins terminals on the fuel pump relay. Check in your owner s manual for the location of the fuse box then find the fuse that corresponds to the fuel pump. Pull the relay straight out from the fuse box to remove it.

How to tell if fuel pump relay is bad while driving. You may find another relay in your car with the same configuration arrangement and number of terminals as your fuel pump. If the relay doesn. By far the easiest way to test a suspect fuel pump relay or some other automotive relay is to swap the suspect relay with a good one.

Check the fuel pump fuse. This video shows you how an automotive relay works and how you can test it using an digital multimeter. Unplug the fuel pump relay but do not break the cover and connecting tabs. This is the easiest way to do it out of the car and t.

Pull it out and inspect it for signs of failure. A fuel pump relay s job is to take some of the voltage load off of the wiring harness to allow a better current flow from the battery to the fuel pump. Consult your owner s manual or a service manual to find the location of your fuel pump relay. You ll be able to find out if the fuel pump relay or the fuel pump inertia switch or the fuel pump is the cause of the no start condition on your ford car or pickup.

Your car s fuel pump relay may be able to supply enough power to the vehicle to allow you to drive it. Testing the ford fuel pump relay on the car is not that hard to do. If the fuel pump relay has an issue while the vehicle is operating it will cut off power to the fuel pump which will cause the engine to stall. When a relay is defective it is usually because of a bad coil or bad connection.

The fastest way to test a fuel pump relay or other automotive relays. Grab the relay firmly on either side and pull it straight up and out from the terminals of the fuse box. With the help of this how to tutorial i ll show you how to do it using only a multimeter. If your car starts to slow down while you are driving it may be a sign of a bad fuel relay.

Often it s not the pump itself that fails to function but the power that supplies it. If the fuse is blown it will be broken or burned. However if the relay is faulty you may notice some problems with the car s performance. Step 2 remove the fuel pump relay.

A car s fuel pump relay turns on the fuel pump when the motor runs. To check both operations remove the relay by pulling it out of its socket.