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International Automotive Technicians Network
Re: Fuel pump issue
Posted to Technical Discussion Forum on 1/16/2020

This what I would do:

Remember there are 2 seperate grounds for the relay; 1 ground comes from the computer (an internal transistor) that controls the relay to switch ON/OFF.

The other ground comes from battery/chasis/splice/etc. - If this is the ground th... Login to read more.