Pinpoint Test F: The Power Window Switch(Es) Illumination Source Is Inoperative - Expedition Only

F1 CHECK THE POWER WINDOW OPERATION
- Key in ON position.
- Turn the headlamp switch to the parking lamps ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Operate the power window switch in both up and down directions.
- Does the power window operate in both up and down directions?
- Yes : INSTALL a new power window control switch assembly. REFER to GLASS, FRAMES AND MECHANISMS .
- No : REFER to GLASS, FRAMES AND MECHANISMS to continue diagnosis of the power window.