Do not make any test connections to a fuel pump if there is petrol vapour about. This is a valid test but make up a test cable specifically for this job & with a wire long enough to be away from fumes.
DO NOT CONNECT A COUPLE OF BARE WIRES ADJACENT TO WHERE PETROL VAPOURS COULD BE PRESENT, your car runs on petrol vapour & it is a tiny spark that makes the whole lot work, just think what a big fat spark could do with twelve litres of petrol in the vicinity.
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