Sunroof / Moonroof: Description and Operation
OPENING/REVERSEWhen the Sunroof Switch is in the "REVERSE/CLOSE VENT" position, battery voltage from RAP Circuit Breaker is applied to the reverse/vent relay coil in the Sunroof Switch Relay. With the reverse/vent relay now energized, voltage is applied to the Motor and the Sunroof Relay coil at terminal "S" through the Limit Switch causing the Sunroof Relay to energize momentarily. When the Sunroof Relay is energized, the Motor will run since the relay's number 2 contacts close to apply ground. The ground path for the Motor is through the Sunroof Relay's number 2 contacts, the LT GRN wire and the Sunroof Switch Relay's forward/vent contacts.
SUNROOF RELAY
The Sunroof Relay's operation is slightly different from most relays in that the number 2 contacts will change position each time the relay is energized but, the contacts will not change position when the relay is de-energized. The number 1 contacts in the relay operate in the same manner as a normal relay but are not used in the Sunroof System. 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, battery voltage from the RAP Circuit Breaker is applied to the forward/vent relay coil in the Sunroof Switch Relay. With the relay now energized, voltage is applied to the Motor through the number 2 contacts in the Sunroof Relay. The Motor is grounded through the Sunroof Switch Relay's 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 number 2 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, the Sunroof Switch is placed in the "FORWARD/VENT" position. This allows battery voltage from the RAP Circuit Breaker to be applied to the forward/vent coil in the Sunroof Switch Relay. With the Sunroof Switch Relay now energized, voltage is applied to the Sunroof Relay coil. The Sunroof Relay will energize momentarily since the coil is grounded through the "ROOF CLOSED" contacts of the Limit Switch and the Sunroof Switch Relay's reverse/close vent contacts. With the Sunroof Relay energized the number 2 contacts close to apply voltage to the Motor and will now run.
VENT CLOSE
To close the roof from the vent position the Sunroof Switch applies battery voltage to energize the Sunroof Switch Relay's reverse/close vent relay. With the reverse close vent relay energized, battery voltage is applied to the Motor through the DK GRN wire. The Motor runs because it is grounded through the DK BLU wire, the Sunroof Relay's number 2 contacts, the LT GRN wire and the Sunroof Switch Relay's forward vent contacts. When the roof reaches the closed position the Limit Switch moves to the "ROOF CLOSED" position. The Limit Switch now energizes the Sunroof Relay by applying voltage to the Sunroof Relay's terminal "S." When the Sunroof Relay energizes, the number 2 contacts latch to open the Motor's ground path. The roof is now in the flush closed position.