Jumping FP and B+ bypasses a number of circuits. You don't need to do anything else when testing it.... just jumper the two and make sure that if any fuel lines are open that they are well isolated from the diagnostic box and that any exiting fuel will be caught and collected safely... there will be some sparks, not allot but enough to merit caution.
I don't believe that the ignition has to be on either, but the online reference is not up at the moment.... so, try the jumper with the jgnition off and if there is nothing try having someone turn the ignition to the "ON" position (without cranking it).
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