Outback Model

Disconnect the ground cable from battery.
Remove the clips and detach the rear combination light covers.

Fig 1: Locating Rear Combination Light Covers Mounting Clips
Courtesy of SUBARU OF AMERICA, INC.
Remove the rear combination light assembly.
CAUTION: Be careful not to damage the clips.
1. Release the bolts and clips, then pull out the rear combination light assembly to the vehicle rear.
2. Disconnect the connector and remove the rear combination light assembly.
  
  Fig 2: Locating Rear Combination Light Assembly Mounting Bolts
  Courtesy of SUBARU OF AMERICA, INC.
Remove the bulb sockets and bulbs.

Fig 3: Removing Tail Light And Stop Light Bulbs
Courtesy of SUBARU OF AMERICA, INC.

Release the claws and remove the bulb inspection cover of rear gate trim

Fig 4: Removing Bulb Inspection Cover Of Rear Gate Trim
Courtesy of SUBARU OF AMERICA, INC.
Remove the bulb socket and tail light bulb.

Fig 5: Removing Bulb Socket And Tail Light Bulb
Courtesy of SUBARU OF AMERICA, INC.