Power Window Master Switch: Illumination

Set the window lock switch to the unlock position.
Connect the positive (+) lead from the battery to terminal 4 and the negative (-) lead to terminal 8, and check that all the illuminations light up. See Fig 1.
Set the window lock switch to the lock position, check that all the passenger's power window switch illuminations go out. See Fig 2. If operation is not as specified, replace the master switch.

Fig 1: Testing Illumination (Unlock Position)

Fig 2: Testing Illumination (Lock Position)