Where is the fuel pump reset switch on a 2002 mercury mountaineer?

There is no fuel pump reset switch on a 2002 Mercury Mountaineer (or virtually any modern vehicle). Fuel pumps are controlled by the onboard computer and don't have a manual reset button.

If you're experiencing fuel delivery problems, the issue is likely more complex and requires professional diagnosis. Possible causes include a faulty fuel pump, a bad fuel pump relay, clogged fuel filter, or a problem with the fuel pump's electrical circuit. You should take your vehicle to a qualified mechanic for proper repair.