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Cannot find motor for sunroof in 1998 lincoln towncar limo

Sunroof will not close. Cannot find where motor to fix

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Jeff Armer

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  • Lincoln Master
  • 15,575 Answers

Before removing the motor ,check for B+ at the switch , in an out of the switch . Lincoln calls this a moon roof an there is a relay that powers it up . The location of relay an the motor is in the same place ,center of headliner behind the roof .

  • Sliding Roof Panel Does Not Open or Close
  • Damaged circuit breaker.
  • Circuitry open/shorted.
  • Damaged roof sliding panel switch.
  • Damaged sliding roof panel motor.
  • GO to Pinpoint Test E .
PINPOINT TEST E: SLIDING ROOF PANEL DOES NOT OPEN OR CLOSE E1 CHECK WINDOW OPERATION
  • Operate window.
Does window operate? Yes No GO to E2 . SERVICE safety relay circuits. REFER to Section 01-11 . E2 CHECK SUPPLY TO SLIDING ROOF PANEL MOTOR
  • Remove roof sliding panel switch as described.
  • Turn ignition switch to the RUN position.
  • Using a voltmeter connected to a known good ground, check Circuit 400 (LB/BK) at roof sliding panel switch connector C900 for voltage.
Is B+ present? Yes No GO to E3 . SERVICE open Circuit 400 (LB/BK). E3 CHECK SLIDING ROOF PANEL SWITCH GROUND
  • Using an ohmmeter connected to a known good ground, connect second lead to Circuit 57 (BK) at roof sliding panel switch connector C900 . Measure resistance.
Is resistance 5 ohms or less? Yes No INSTALL roof sliding panel switch. GO to E4 . SERVICE Circuit 57 (BK) for open circuit. RESTORE vehicle. RETEST system. E4 CHECK CIRCUIT 692 (R)
  • Using voltmeter connected to ground, back probe Circuit 692 (R) at roof sliding panel switch connector C901 .
  • Toggle roof sliding panel switch to the open position.
Is B+ present? Yes No GO to E5 . REPLACE damaged roof sliding panel switch. RESTORE vehicle. RETEST system. E5 CHECK ROOF SLIDING PANEL SWITCH
  • Using voltmeter connected to ground, back probe Circuit 691 (DB) at roof sliding panel switch connector C901 .
  • Toggle roof sliding panel switch to the closed position.
Is B+ present? Yes No GO to E6 . REPLACE damaged roof sliding panel switch. RESTORE vehicle. RETEST system. E6 CHECK SLIDING ROOF PANEL MOTOR
  • Gain access to sliding roof panel motor as described.
  • Using voltmeter, back probe sliding roof panel motor Circuit (DB) at connector C903 .
  • Toggle roof sliding panel switch to the closed position.
Is B+ present? Yes No GO to E7 . SERVICE Circuit (DB) for open. RESTORE vehicle. RETEST system. E7 CHECK CIRCUIT 692 (R/Y)
  • Using voltmeter, back probe sliding roof panel motor Circuit (R/Y) at connector C903 .
  • Toggle roof sliding panel switch to the open position.
Is B+ present? Yes No REPLACE damaged sliding roof panel motor. RESTORE vehicle. RETEST system. SERVICE Circuit (R/Y) for open. RESTORE vehicle. RETEST system.

Posted on Sep 20, 2015

  • Jeff Armer Sep 20, 2015

    Motor
    Removal

    Operate roof sliding outer glass panel (502A82) until rear of roof sliding outer glass panel is flush with roof panel (502B98).

    Remove roof headlining access hole cover (52076).

    Disconnect battery ground cable (14301). Refer to Section 14-01 .

    Remove two sliding roof panel motor retaining bolts.

    Lower sliding roof panel motor (15790) away from roof sliding panel rail (51070) and disconnect electrical connector.


    Installation

    Follow removal procedure in reverse order.

    Synchronize sliding roof panel motor as described under Adjustments .

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Sunroof does not open. Fuse is ok and the shade operates normally.


Do you know how to do automotive electrical testing ?????? How to read a wiring diagrams ???? http://www.bbbind.com/free_tsb.html .Videos on youtube Ohms Law Tech Tip from L1 with Dave Hobbs Copy of Voltage Drop Essentials TST Motor Age The only way to find the problem , testing !

Sunroof Description and Operation (One Connector System)
Sunroof
This diagnostic procedure is to be used for the 1 connector Sunroof System that combines the sunroof control module with the sunroof motor/actuator.
The Sunroof System consists of the following components:
• BATT MAIN 2 Fuse 50 A
• Body control module (BCM)
• RAP relay
• S/Roof Fuse 20 A
• Sunroof module (includes sunroof motor/actuator)
• Sunroof switch
The Sunroof System is controlled by the sunroof switch and the sunroof motor/actuator assembly.
When the ignition is turned to RUN or ACCESSORY, or when the retained accessory power (RAP) system is active, the body control module (BCM) applies a ground to the RAP relay in the instrument panel (I/P) fuse block. This activates the RAP relay and allows battery positive voltage to be applied through the SUNROOF Fuse to the sunroof module. Ground for the sunroof module is supplied from G302.
The sunroof can be placed in 3 preset positions:
• Open
• Vent
• Closed
When the sunroof switch is placed in the OPEN position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch open signal circuit. The sunroof motor/actuator then applies voltage to the sunroof motor open control circuit and applies a ground to the sunroof motor close circuit. The sunroof motor then opens the sunroof to the full open position.
When the sunroof switch is placed in the VENT position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch open signal circuit. The sunroof module then applies voltage to the sunroof motor open control circuit and applies a ground to the sunroof motor close circuit. The sunroof motor then opens the sunroof to the VENT position.
When the sunroof switch is placed and held in the CLOSED position, a ground is applied from the sunroof switch low reference circuit , through the sunroof switch and to the sunroof switch close signal circuit. The sunroof module then applies voltage to the sunroof motor close control circuit and applies a ground to the sunroof motor open circuit. The sunroof motor then closes the sunroof.
The sunroof can be placed in any preferred open position when:
• The sunroof is in the fully opened position by pressing and holding the sunroof switch in the CLOSE position until the panel has reached the desired position then release the CLOSE switch in order to stop the sunroof
• The sunroof is opening, it can be stopped by momentarily pressing either side of the switch.
The sunroof control module, sun roof actuator, and the sunroof motor are integral parts of the sunroof module assembly and are not service separately.

Your best bet , take it to a qualified repair shop or buick dealer .

Feb 10, 2017 | 2010 Buick LaCrosse CXS

1 Answer

My sunroof doesn't close


This could be a couple of problems. Check to see that there is nothing in the sunroof track. Believe it or NOT you may even have a worn sunroof motor. Over time it can drag down needing replaced. Need more info...how old is the Vehicle & does the sunroof open real slow in reverse direction. Are you able to close it helping along with your hand and the sunroof motor as well?

Feb 08, 2016 | 1999 Lincoln Continental

1 Answer

The sunroof is stuck open


Could be a bad motor or switch.,to check,get a meter,turn sunroof to close and check wiring at sunroof,if power is their,then bad motor or switch,check fuse first.

Jun 28, 2015 | 1998 Mazda 626

1 Answer

MY SUNROOF ON MY 2004 LINCOLN TOWNCAR WONT OPEN


It could be the button, motor, wiring or module being bad. Have it scanned, this will lead to a certain direction. My guess would be the module first, motor second. Both are a pain/ time consuming job..

Dec 04, 2014 | 2004 Lincoln Town Car

1 Answer

Sunroof on 1998 chevy cavalier z24 won't close all the way


It can be faulty motor or loose wiring issue or faulty /weak sunroof controlling switch or there is some blockage for sunroof to come down to close or sunroof out of its track the headliner is out of its way.There re many possibilities.All this basics needs to be checked.For further troubleshooting,go through this help link:----
Click the link mentioned below:------
How to Manually Close the Sunroof ? http://howtobyme.blogspot.in/2012/05/how-to-manually-close-sunroof-on-2001.html

-------------
Sunroof Stuck open? http://howtobyme.blogspot.in/2012/05/2001-lexus-is300-sunroof-stuck-open.html

----------
How to manually close Sunroof on Navigator? http://technoanswers.blogspot.com/2012/01/how-to-manually-close-sunroof-on-2000.html

----------
This will help.
Thanks.

Jun 05, 2012 | Chevrolet Cavalier Cars & Trucks

4 Answers

Electric sunroof stuck open can it be closed manually


THE ELECTRIC DRIVE SYSTEM FOR POWER SUNROOF IS NOT ADJUSTABLE.DONT REMOVE THE SUNROOF MOTOR UNLESS THE SUNROOF IS COMPLETELY CLOSED.OTHERWISE A NEW MOTOR WILL HAVE TO BE INSTALLED AND TIMED WITH A TOOL THAT COMES WITH THE NEW MOTOR.THE GLASS PANEL CAN BE ADJUSTED.OPEN THE INTERIOR SUNSHADE ALL THE WAY BACK AND OPERATE THE SUNROOF UNTIL FULLY CLOSED.THERE ARE THREE GLASS MOUNTING SCREWS ON EACH SIDE OF THE SUNROOF OPENING.INSIDE THE VECHICLE LOOSEN THE SCREWS SET THE FRONT EDGE OF THE GLASS TO BE JUST 1MM BELOW THE SURFACE OF THE ROOF.ADJUST THE GLASS AT THE REAR EDGE TO BE JUST ABOVE 1MM THE ROOF AT THE REAR TIGHTEN THE SCREWS.

May 23, 2010 | 2001 Pontiac Grand Am SE

1 Answer

Moonroof wont close all the way


Do you know how to test automotive electrical circuit's with a DVOM - digital volt ohm meter ? When adjusting the moon roof did you see any switches ? sunroof limit switch
Measure the reference voltage of the sunroof limit switch soft stop signal circuit at the sunroof control harness connector to a good ground.
Does the reference voltage measure near the specified value?
4.5-5.5 V
Notice: Do not open the sunroof glass past the full open soft stop position. Doing so may damage the sunroof assembly and or the roof top.
Connect a jumper wire to the sunroof limit switch soft stop signal circuit at the sunroof control module harness to a good ground.
Turn ON the ignition, with the engine OFF.
Using the sunroof switch, operate the sunroof system, not to exceed the full open soft stop position.
Does the system operate as requested?

Do you know what a wiring diagram is ? Free one's here
http://www.bbbind.com/free_tsb.html Enter vehicle info. year ,make ,model an engine size . Under system click body & accessories ,then under subsystem click on sun roof . Click the search button then the blue link . See the control module , motor an the two switches ? One is probably miss adjusted . or bad !

Power Sunroof System Components
The power sunroof system consists of the following components:
• Sunroof control module
• Sunroof motor with the limit switches
• Sunroof switch
• Sunroof glass-spoiler type, with glass sliding above roof
• Sunshade
• Rail and track assembly upon which the sunroof glass rides
• Power sunroof system circuit breaker: PWR WDO 25 A
• Ground: G204

Sunroof Limit Switches
The sunroof limit switches track the position of the sunroof glass through two limit switches:
• Soft Stop limit switch through the sunroof limit switch soft stop signal circuit
• Vent Stop limit switch through the sunroof limit switch range signal circuit
The sunroof control module monitors the limit switches and based on the input combinations, determines the position of the sunroof glass. As a sunroof limit switch closes, the 5 volt reference will be shorted to the sunroof limit switch low reference circuit, pulling the 5 volt reference to 0 volts.
The sunroof control module monitors both sunroof switch input requests and based on the sunroof limit switch input combinations, will control an output to the sunroof motor, to drive the sunroof glass to the requested position.

Sunroof Motor
The sunroof has a bi-directional motor. When the motor is not operating both circuits are grounded. When the motor drives the sunroof glass in the direction from the closed to vent or vent to open position, the following occurs:
• Voltage is supplied to the sunroof motor open circuit.
• Ground is maintained to the sunroof motor close circuit.
When the motor drives the sunroof in the direction from the open to vent or vent to closed position, the following occurs:
• Voltage is supplied to the sunroof motor close circuit.
• Ground is maintained to the sunroof motor open circuit.
The sunroof control module is equipped with a timer circuit which stops the operation of the sunroof motor after 8 seconds.

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4 Answers

1993 lincoln towncar sunroof switch


I know this is an old blog but some people may still find it helpful. There are 4 wires in the roof window switch hooked up to 2 smaller harnesses that have 2 wires each.

Remove the switch and use only the metal contacts in the harnesses. One should use a light tester to confirm which one is the ground and live. this is how it turned out for my car.

One harness has a light blue wire with a black stripe, and a black wire. the blue one is live, the black one is ground.

The other harness has a red wire and a darker blue wire (silly ford) these are the motor connect and return wires.

You must hook up thhooked to (example, if the live wire was connected to blue motor wire and the ground wire was connected to red motor wire and it opened it, that would mean you would want to put the live wire to the red motor wire and the ground wire to the blue motor wire)

When doing these wire connections, it is advised that you have the ignition turned off. Once you make all the connections properly, you can turn on the ignition and if done correctly, the roof window will move. Once it is closed, remove the wires frome the harnesses and LEAVE THE ROOF WINDOW ALONE UNTIL YOU HAVE A NEW SWITCH.
e power (Live, light blue) wire to a motor wire. You must then run another wire from the other motor wire. To complete this circuit there is only one place that this last wire can go and it is to the ground. once this is connected the roof should either open more or close.

To reverse the operation of the roof, simply reverse the position of the live and ground wires in respect to which motor wires they are

May 25, 2008 | 1993 Lincoln Town Car

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