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Mounting Ecm

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3:30 p.m.: The ECM can be mounted just about anywhere, but should not be mounted in an area of high heat. It should also be somewhere that gets a little bit of airflow, not in a glove box or center console. Make sure all of the wiring will reach the location you choose. Also remember that you’ll want the ECM somewhere you can easily plug in the handheld controller. Once installed, wiring includes clicking two harnesses in place, running positive and negative wires to the battery, another to a keyed 12-volt source and running the power supply wire to the fuel pump. A relay is not required when using the MSD fuel pump.