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RELAYS AUTO PARTS: FUEL PUMP RELAY
HOW TO DETECT THE FUEL PUMP RELAY FAILURE
You need a test lamp to check the fuel pump relay performance. One of its contacts should be connected to the pin going to the controller, the second to the wire from the main relay. Then you need to switch on the ignition. The absence of light indicates the part failure.
Then you need to close the pins to which the battery is connected and the fuel pump power cable with the help of a jumper. If the pump is activated after you turn on the ignition, the relay is faulty.
Another method is installing a fully operable part instead of the part that is being tested.
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