Sunroof / Moonroof: Description and Operation
OPENING/REVERSEWhen the Sunroof Switch is in the REVERSE position, voltage is applied to the Motor and the Sunroof Relay coil at terminal 6 causing the relay to energize. With the relay energized the motor will run since the Sunroof Relay contacts close to provide a ground path for the motor through the Sunroof Switch FOR- WARD/VENT contacts.
SUNROOF RELAY
The Sunroof Relay's operation is slightly different than most relays in that one set of contacts will change position each time the relay is energized but will not change position when the relay is de-energized. The other set of contacts in the relay operate in the same manner as a normal relay. The contacts will close when the relay is energized and open once the relay has de-energized.
CLOSING/FORWARD
When the Sunroof Switch is in the FORWARD/VENT position, voltage is applied to the motor through the latching contacts in the Sunroof Relay. The motor is grounded through the Sunroof Switch REVERSE/CLOSE VENT contacts allowing the motor to run. Voltage is also applied to the Sunroof Relay Coil when the Sunroof Switch is in the FORWARD/VENT position, but the relay is not energized until the Limit Switch contacts move to the ROOF CLOSED position. When the relay energizes, the latch contacts will open cutting power off to the motor. This prevents the Sunroof from going into the VENT position.
VENT
When the VENT position is desired, voltage is applied to the Sunroof Relay coil from the FORWARD/VENT contacts of the Sunroof Switch. The relay will energize since the coil is grounded through the ROOF CLOSED contact of the Limit Switch and the REVERSE/ CLOSE VENT contacts of the Sunroof Switch. With the Sunroof Relay energized the latch contacts close to apply voltage to the motor.
VENT/CLOSE
To close the Sunroof from the vent position, voltage is applied to the motor from the REVERSE/CLOSE VENT contacts of the Sunroof Switch. The Sunroof Relay will not be energized until the Limit Switch is in the ROOF CLOSED position. When the Sunroof Relay energizes the latch contacts will open the motor's ground circuit. This will prevent the Sunroof from opening if the Sunroof Switch is not released.