To find it, you'll likely need to:
* Feel around: Run your hand along the underside of the dashboard on the passenger side. The switch is often a small, square or rectangular box.
* Consult your owner's manual: This is the best resource for the precise location in your specific Mustang.
* Look online: Search for "2000 Ford Mustang inertia switch location" along with images. This can help you visually identify the switch.
If you can't find it easily, it might be hidden behind a panel. Be cautious when removing panels to avoid damaging anything.