Question about 1991 Mercury Grand Marquis

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Front door locks

They are power locks but front doors have a little switch that you move up and down they are jammed or broke so front doors dont lock but rear doors do how would i fix front door locks

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  • Anonymous Feb 17, 2009

    power doorlocks are sticking

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You have to remove the cluster of door switches out of the arm of your door usaully phillips screwdriver once you have it out flip over undo the screws holding the harness to the switch assembly unscrew the bad set or replace the cluster from a junk yard or part store reassemble in reverse alldone

Posted on Sep 13, 2008

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Power lock actuators are shot. Replacement ones from Ford list at 185 bucks. Also actuator is riveted in place.

Posted on Mar 17, 2009

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2005 Buick Rendezvous you can hear the relay clicking but the door locks will not open and close


Check for broke wires inside the boot from body to driver door , this is a common problem . If you don't find broke wire's , pull the door panel to get at driver door switch . Check for voltage an ground circuit .
Rendezvous Door Lock System Components
The power door lock system consists of the following components:
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Body control module (BCM)


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Driver door lock switch


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Front passenger door lock switch


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Door lock actuators in each of the doors


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Door lock system fuse into the BCM (BCM D 25A fuse)


Door Lock Operation
When the BCM detects a transition of either of the door lock switches to the LOCK position, it switches the door lock actuator lock control circuit to voltage. Since the lock actuator unlock control circuits are at ground potential within the BCM, the door lock actuator motors transition to the Lock position.
Driver Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the driver door lock actuator unlock control circuit to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the LF door lock actuator motor transitions to the Unlock position.
The driver door lock actuator unlock control circuit is a dedicated control circuit used only for the driver door lock actuator motor. This is done so that the driver door may be unlocked by itself using a keyless entry transmitter or an automatic door unlock function (if programmed).
Passenger Door Unlock Operation
When the BCM detects a transition of either of the door lock switches to the UNLOCK position, it switches the door lock actuator unlock control circuits to voltage. Since the door lock actuator lock control circuit is at ground potential within the BCM, the passenger door lock actuator motors transition to the Unlock position.
The door lock actuator unlock control circuits are dedicated control circuits used only for the passenger door lock actuator motors. This is done so that the driver door may be unlocked seperate from the passenger doors using a keyless entry transmitter or an automatic door unlock function (if programmed). This video on testing computer controlled door locks on a Subaru , doesn't matter . test yours same way > The BCM controls your door locks .
Are all of the power door locks inoperative from both door lock switches?

Oct 12, 2016 | 2005 Buick Rendezvous

1 Answer

Passanger side doors wont lock


From where , any switch ? driver door switch or either passenger door switch . This is a very complex system controlled by modules (microprocessors)
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The driver door switch assembly (DDSA)


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The driver door module (DDM)


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The passenger door module (PDM)


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The rear door module (RDM)


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The LH front power door lock switch


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The RH front power door lock switch


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The LH front door lock actuator


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The RH front door lock actuator


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The LH rear door lock actuator


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The RH rear door lock actuator


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The remote control door lock receiver (RCDLR)


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The power door serial data circuit


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The class 2 serial data circuit


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The DRVMDL Fuse - 10 amp


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The PDM Fuse - 10 amp


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The RRINMDL Fuse - 10 a
Class 2 and Power Door Serial Data Links
The class 2 and power door data circuits are both serial data links. The serial data circuits replace cables in the vehicle by multiplexing (time-sharing) data to and from each device over a single wire referenced to ground. If the power door serial data is lost, both the rear door module (RDM) and the passenger door module (PDM) enters the sleep mode. With the RDM and the PDM in sleep mode, no power door operations are possible.
Your best bet is to take it to the dealer or an ASE certified repair shop .

Feb 20, 2016 | 2003 Buick Park Avenue

2 Answers

2002 Hyundai Elantra Drivers dorr Lock Jammed not unlocking properly. Lock lever on inside and key on outside are stuck and door move bery much and will not unlock car. Originally cable in door to release...


Same thing happened with mine. It turned out that the power door lock motor went out. Since the handle or the switch can unlock the driver's door, both of these mechanisms are connected. When the door lock motor goes out it freezes in whatever position, it was last engaged.

Nov 06, 2010 | Hyundai Motor 2002 Elantra

1 Answer

Front drivers door does not lock or open through central locking however all others work fine


possible bad actuator ,wiring/connection problem,switch,actuator rod disconnected[clip popped off or broke-u can test power to switch but for the others need to remove door panel to access the lock system

Feb 02, 2010 | 2006 Volkswagen Golf

1 Answer

Power sliding door will not open at all manually with remote or with door locks tried to remove iod fuse and sliding door fuse but still dont open thanks


either something jammed in track/lock-- or actuator rod broke or disconnected from lock --need to remove interior door panel to get to lock release and latch check all rods and clips for damage or missing repair or replace as necessary u can manually unlock the door at latch if something was jammed or stuck in latch

Nov 26, 2009 | 2007 Dodge Caravan SXT Minivan New Cars

1 Answer

Driver side door lock won't open or lock using remote.


if it moves even a little bit when the button is pushed it wont be a fuse issue, you more than likely have a weak door lock actuator

Nov 25, 2009 | Cars & Trucks

1 Answer

I have a 2004 chevy venture. The power locks do


open the door and look on the side of door for little switch up and down ,it a safety switch ,little gray lever sticking out on the side of doors, move it up or down ,read decal on the door jam,hope to help robert b.

Jul 16, 2009 | 2003 Chevrolet Venture Passanger

3 Answers

1999 Honda CRV automatic door lock only works for three doors


the little motor that operates it inside the door is probably frozen, so it will need to be replaced!!

Jun 19, 2009 | 1999 Honda CR-V

1 Answer

Drivers side door power locks and windows control doesn't work.


PULL THE DOOR OFF MAKE SURE THE 2 LITTLE DOOR HANGERS ARE CONNECTED TO THE SWITCH MECHANISM IF IT IS. THEN YOUR SWITCH IS BROKE. GO TO SCHUCKS AND ASK THEM IF THEY CAN ORDER YOU A WHOLE NEW DOOR LOCK SWITCH ASSEMBLY. REWIRE AND TAA-DA!!!

May 04, 2009 | 2002 Jeep Grand Cherokee

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