Where is the cigarette lighter fuse on a 2006 Ford E-250?

The location of the cigarette lighter fuse in a 2006 Ford E-250 isn't standardized across all trims and configurations. It's usually found in either the under-hood fuse box or the fuse panel inside the vehicle (often under the dashboard).

To find it, you need to consult your owner's manual. The manual will have a fuse diagram showing the location of all fuses, including the one for the power outlet (cigarette lighter). The diagram will typically label it as "Power Outlet," "Accessory," or something similar, not necessarily "Cigarette Lighter."

Without your owner's manual, providing the exact location is impossible.