Power Sun Roof Cadillac DeVille Concours

DESCRIPTION & OPERATION

Sun roof contains a sliding glass panel with a sunshade that opens as sun roof is opened or can be manually opened. Sun roof is operated by a 2-position overhead console mounted microswitch. Sun roof has 3 positions: OPEN, CLOSED and VENT. When sun roof is in VENT position, rear of glass panel is outside of vehicle, above roof panel.

Microswitch is only operational with the ignition switch in RUN or ACC positions. The OPEN/VENT side of switch has 2 positions. The CLOSED side has one position.

Major components of the power sun roof assembly are: sliding glass panel, microswitch, sunshade panel, wind deflector, drain channel, motor and module, drive cables, and wiring harness. Refer to Fig. (Scheme 1).

Scheme 1

DRAIN HOSES

Pour about 16 ozs. (500 mm) of water slowly into drain channel. Observe lower side of vehicle. If water flow is restricted, blow out drain hose system with compressed air.

LUBRICATION

Note. Manufacturer does not recommend lubricating sun roof cables except when removing and installing cables. Lubricate cables before installing, using No. 70 Lubriplate White Grease or equivalent.

SUN ROOF GLASS

During installation of sun roof glass, adjust sun roof glass to 0.04"(1.0 mm) below roof surface at front of glass, and 0.04" (1.0 mm) above roof surface at rear of glass. See SUN ROOF GLASS PANEL under REMOVAL & INSTALLATION. Adjustment allows smooth and easy operation.

WIND DEFLECTOR

Open sun roof. Loosen wind deflector screws. Adjust top surface of wind deflector to 0.75" (19.0 mm) above top surface of roof panel. Tighten wind deflector screws.

TROUBLE SHOOTING

Check following items listed below symptom to aid in diagnosis and repair of sun roof module.

CLOSED SUN ROOF RATTLES WHILE DRIVING

1. Loose attaching hardware
2. Wire harness or cables improperly secured
3. Wind deflector contacting glass panel or drain channel

OPEN SUN ROOF RATTLES WHILE DRIVING

1. Loose attaching hardware
2. Weak springs on wind deflector

SUN ROOF DOES NOT VENT

1. Binding cable
2. Faulty switch ground circuit
3. Faulty switch power circuit
4. Faulty switch

SUN ROOF GLASS PANEL HANGS UP OR SNAPS BETWEEN VENT & OPEN

1. Glass panel improperly adjusted
2. Opening weather-stripping has inconsistent compression

SUN ROOF MOTOR INOPERATIVE

1. Contaminated or corroded slides and channels
2. Binding cable or linkage
3. Faulty switch ground circuit
4. Faulty switch power circuit
5. Faulty switch
6. Faulty sun roof drive motor

SUN ROOF OPENS, BUT DOES NOT CLOSE

1. Binding linkage or cable
2. Faulty switch ground circuit
3. Faulty switch power circuit
4. Faulty switch

SUN ROOF VENTS, BUT DOES NOT OPEN

1. Binding linkage or cable
2. Faulty switch ground circuit
3. Faulty switch power circuit
4. Faulty switch

SUN ROOF WATER LEAK

1. Drain hoses kinked or clogged
2. Glass panel improperly adjusted
3. Faulty opening in weather-stripping

WIND NOISE FROM SUN ROOF

1. Front of glass panel too high
2. Faulty opening in weather-stripping

SUN ROOF DOES NOT OPERATE

1. Disconnect 2 sun roof control module connectors, located between headliner and roof. Turn ignition switch to RUN position. Connect test light between ground and Pink wire terminal of sun roof control module harness connector. If test light is on, go to next step. If test light is off, repair open Pink or Brown wire between sun roof control module connector and fuse block.
2. Connect test light from battery voltage to Black wire terminal of sun roof control module harness connector. If test light is on, go to next step. If test light is off, repair open Black wire from sun roof control module connector to ground connection. Refer to Figs. see scheme 2.
3. Using a DVOM set to voltmeter mode, check for voltage between Pink wire and Brown wire terminals of sun roof control module harness connector. If voltage is not present, go to next step. If voltage is present, repair short to ground in Brown wire to sun roof switch.
4. Check for voltage between Pink wire and Orange wire terminals of sun roof control module harness connector. If voltage is not present, go to next step. If voltage is present, repair short to ground in Orange wire.
5. Manually open sun roof. Set DVOM to ohmmeter mode. Measure resistance between Brown wire and White wire terminals of sun roof control module harness connector. If infinite resistance exists, go to next step. If infinite resistance does not exist, repair short between White wire and Orange wire or Brown wire. If wires are okay, replace sun roof switch.
6. Measure resistance between Orange wire and White wire terminals of sun roof control module harness connector. If infinite resistance exists, go to next step. If infinite resistance does not exist, repair short between White wire and Orange wire or Brown wire. If wires are okay, replace sun roof switch.
7. Measure resistance between ground and Red wire terminal of sun roof control module harness connector. If infinite resistance exists, go to next step. If infinite resistance does not exist, repair short to ground in Red wire. If wire is okay, replace sun roof motor.
8. Measure resistance between Red wire and Yellow wire terminals of sun roof control module harness connector. If infinite resistance exists, go to next step. If infinite resistance does not exist, repair short between Yellow wire and Red wire. If wires are okay, replace sun roof motor.
9. Hold sun roof switch to close position. Measure resistance between White wire and Brown wire terminals of sun roof control module harness connector. Hold sun roof switch to open position. Measure resistance between White wire and Orange wire terminals of sun roof control module harness connector.
10. If resistance is less than 5 ohms at each set of wire terminals, go to next step. If resistance is more than 5 ohms at each set of wire terminals, repair open in Orange wire, White wire or Brown wire. Check for poor connections at sun roof switch and sun roof control module. Repair as necessary. If wires and connections are okay, replace sun roof switch.
11. Close sun roof. Connect fused jumper between Pink wire and Blue wire terminals, and between Green wire and Black wire terminals of sun roof control module harness connector.
12. If sun roof motor operates, check for poor connection at Pink wire terminal. Repair as necessary. If connection is okay, replace sun roof control module. If sun roof motor does not operate, repair open or short to ground in Blue wire and Green wire. If wires are okay, replace sun roof motor.

SUN ROOF OPERATES, BUT DOES NOT STOP IN FLUSH POSITION

1. Disconnect sun roof control module 8-pin connector. Turn ignition switch to RUN position. Ensure sun roof is closed. Using a DVOM set to ohmmeter mode, measure resistance between Red wire and Yellow wire terminals of sun roof control module harness connector. see scheme 2 If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in Red wire or Yellow wire. If wires are okay, replace sun roof motor.
2. Manually open sun roof. Measure resistance between Red wire and Yellow wire terminals of sun roof control module connector. If infinite resistance exists, go to next step. If infinite resistance does not exist, replace sun roof motor.
3. Measure resistance between ground and Red wire terminal of sun roof control module connector. If infinite resistance exists, check for poor connection at sun roof control module connector. If connection is okay, replace sun roof control module. If infinite resistance does not exist, repair short to ground in Red wire. If wire is okay, replace sun roof motor.

REMOVAL & INSTALLATION

Removal

Disconnect negative battery cable. Remove headliner. Disconnect wiring harness from sun roof assembly. Remove drain hose clamps. Disconnect drain hoses from sun roof assembly. For installation reference, mark outline of sun roof assembly on inside of roof panel. Remove bolts holding sun roof assembly to roof forward flange. Remove bolts holding sun roof assembly to roof panel. Remove sun roof assembly from roof panel. (Scheme 1)

Installation

Place sun roof assembly on roof panel. Install bolts holding sun roof assembly to roof panel. DO NOT tighten bolts. Align index mark outline inside of roof panel to sun roof assembly and tighten bolts. Install and tighten bolts holding sun roof assembly to brackets along side rails. Install and tighten bolts to hold sun roof assembly to roof forward flange. Install and tighten drain hoses and hose clamps to sun roof assembly. Connect wiring connector into sun roof assembly. Install headliner. Connect negative battery cable.

Disconnect negative battery cable. Remove overhead console. Disconnect wiring connector from sun roof motor and drive gear. (Scheme 1) Remove switch from console.

Push switch into hole in overhead console until retaining clips engage. Connect wiring connector to motor and drive gear. Connect negative battery cable.

Remove 2 drive cable locator screws. Pull cables forward from casings and tracks. Remove cables. To install, reverse removal procedure. Lubricate cables before installing, using No. 70 Lubriplate White Grease or equivalent. (Scheme 1)

Remove headliner and sun visors. Remove module from bracket. Disconnect electrical connector from module. Remove module. To install, reverse removal procedure. Ensure sun roof operates properly.

Remove headliner. Disconnect motor connector from sun roof wiring harness. Remove bolt(s) holding motor to sun roof assembly. Remove motor from sun roof assembly. (Scheme 1)

Place motor in position on sun roof assembly. Install and tighten bolt(s) holding motor to sun roof assembly. Connect motor wire connector to sun roof wiring harness. Install headliner.

Remove wind deflector. See SUN ROOF WIND DEFLECTOR. Open sun roof to vent position. Remove drain channel. For installation reference, mark outline of screw heads on glass panel mounting brackets. Remove screws holding glass panel mounting brackets to front guide pivots. Remove screws holding glass panel mounting brackets to glass panel slides. Remove slide retainers and bushings from behind glass panel slides. Remove sun roof glass panel. To install, reverse removal procedure. (Scheme 1)

Remove sun roof glass panel. Remove screws holding guide links to rear channel. Remove screws holding rear drain channel to sun roof assembly. Remove rear drain channel. To install, reverse removal procedure. (Scheme 1)

Open sun roof. Remove screws holding track access plugs to sun roof housing on each side of wind deflector. Remove wind deflector. To install, reverse removal procedure. (Scheme 1)

Remove sun roof glass panel. Remove rear drain channel. Bow sunshade panel upward to release panel from channel forward of sun roof opening. Lift sunshade panel up into slot in left channel. Slide sunshade forward. Remove sunshade. To install, reverse removal procedure. (Scheme 1)

See also:
• COMPUTER RELEARN PROCEDURES
• SUN ROOF GLASS PANEL