Windows and Glass: Description and Operation

Glass, Frames and Mechanisms

The glass, frames and mechanisms section consists of the following:

- Windshield glass
- Front door window glass
- Front door window regulator and motor
- Front door window top run
- HVAC module
- Power/manual sliding glass panel (if equipped)
- Rear door window glass
- Rear door window regulator and motor
- Rear door window top run
- Rear window glass
- Rear window glass regulator and motor
- Smart Junction Box (SJB)
- Window control switch

If equipped with power windows, the window control switch:

- will operate the power windows when the ignition switch is in the RUN or ACC position, or the delayed accessory feature is active.
- may be used to raise or lower the driver side, passenger side and rear windows from the LH front window control switch, or an individual window from the corresponding window control switch located in the door trim panel.
- includes a one-touch down feature for the LH front window.
- can proportionally lower the LH front window when the LH front window control switch is pressed to the 1st detent.
- for SuperCab and SuperCrew, can lock out passenger front and rear window control switches when the lock-out switch on the left front window control switch is turned on.
- will automatically lower the LH front window control switch when the LH front window control switch is momentarily pressed to the second detent.

The rear glass:

- may be equipped with an optional manual sliding glass.
- may be equipped with an optional power sliding glass.

Delayed Accessory Feature

The accessory delay relay, located in the SJB, provides power for the operation of the power windows and the power moon roof (if equipped). The accessory delay feature is active when the ignition switch is in the RUN or the ACC position, or when the ignition switch is changed from RUN or ACC to the OFF/LOCK position and the LF and RF doors are closed.

Heated Rear Window

The HVAC module controls the state of the rear window defrost relay. When the rear window defrost switch (integral to the HVAC module or Front Controls Interface Module (FCIM) if equipped with navigation system) is pressed and the engine is running, the HVAC module will activate the rear window defrost relay. When the rear window defrost relay is active, the rear window defrost grid will be energized and the rear window defrost status LED will be illuminated. For vehicles equipped with a power sliding rear window, the rear window defrost relay will not activate unless the rear sliding window glass is in the fully CLOSED position.