Outback Model

Disconnect the ground cable from the battery.
Disengage the two clips, and then turn over the lower mud guard.

Fig 1: Locating Lower Mud Guard Clips
Courtesy of SUBARU OF AMERICA, INC.
Disconnect the harness connector.
Remove the mounting nuts and clips, and detach the fog light assembly by pulling it out.

Fig 2: Locating Fog Light Assembly Mounting Nuts And Clips
Courtesy of SUBARU OF AMERICA, INC.