WARNING: This page is about a different car, the 2008 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Ground Distribution Circuit, Except WRX STI (1 of 3)
Fig 2: Ground Distribution Circuit, Except WRX STI (2 of 3)
Fig 3: Ground Distribution Circuit, Except WRX STI (3 of 3)
Fig 4: Ground Distribution Circuit, WRX STI (1 of 2)
Fig 5: Ground Distribution Circuit, WRX STI (2 of 2)