Fuel and Fuel Intake
Fuel Pumps

How do you bypass a relay to test an electric fuel pump?

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Wiki User
2006-12-05 23:54:26

Depends. I have to assume It is On or In a car. If that is the

case, disconnect the wireing harness running to ithe pump. take a

12-volt battery with lead wires and touch the prongs of the wires

going into the pump assembly itself. ( should be 2-3 wires, +,-,

& Ground) run a wire fromn your batt to your fuel pump

..figuire out wich 1 is the + and hook it to the wire ..if pump

kicks on then pump is good ,if not then pump is junk .

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