Sunroof / Moonroof: Description and Operation

With the Ignition Switch in RUN, voltage is present at the coils and contacts of both relays in the Moonroof Relay Pack.

Open/Close Operation

With the Moonroof Open/Close Switch in the OPEN position, the coil of relay "1" is grounded and the coil is energized. The contacts close and current flows through the MOONROOF Fuse, relay "1's" contacts (energized), the Power Moonroof Motor and relay "2's" contacts (deenergized to ground. The Moonroof Motor runs to open the glass roof panel. As soon as the panel begins to open Limit Switch "2" in the Moonroof Drive Assembly Switch changes position. This disables the panel tilt up circuit to prevent the panel from being tilted up while it is retracted.

With the Moonroof Open/Close Switch in the CLOSE position, the coil of relay "2" is grounded and the coil is energized. The contacts close and current flows through the MOONROOF Fuse, relay "2's" contacts (energized), the Power Moonroof Motor and relay "1's" contacts (deenergized) to ground. The Moonroof Motor runs to closes the glass roof panel. As soon as the panel is completely closed. Limit Switch "2" in the Moonroof Drive Assembly changes position. The panel tilt up circuit is now enabled.

Tilt Up/Down Operation

With the Moonroof Tilt Up/Tilt Down Switch in the TILT UP position (and Limit Switch "2" in the "Panel Fully Closed" position), the coil or relay "2" is grounded and the coil is energized. The contacts close and current flows through the MOONROOF Fuse, relay "2's" contacts (energized), the Power Moonroof Motor and relay "1's" contacts (deenergized) to ground. The Moonroof Motor runs to tilt the rear edge of the glass roof panel upward. As soon as the panel begins to tilt, Limit Switch "1" in the Moonroof Drive Assembly changes position.

With the Moonroof Tilt Up/Tilt Down Switch in the TILT DOWN position (and Limit Switch "1" in the PANEL TILTED UP position), the coil of relay "1" is grounded and the coil is energized. The contacts close and current flows through the MOONROOF Fuse, relay "1's" contacts (energized), the Power Moonroof Motor and relay "2's" contacts (deenergized) to ground. The Moonroof Motor runs to tilt the rear edge of the glass roof panel downward. As soon as the panel is closed. Limit Switch "1" in the Moonroof Drive Assembly changes positions.