Question about 1993 Mercury Grand Marquis
When the doors lock/unlock, either by using the keyless remote control, the switch on the door or by engaging the gearshift in Drive, there is a loud grinding noise in the driver side door.
The car is equipped with keyless entry too.
Well the motor that locks the door is either breaking or either the wire or some part that moves is rubbing on something else. Take off the inner door panel and find the Exact location of the noise and you can replace the part. The door panel will be held on with screws and removable tabs that should pop out. Let me know if you get stuck. the parts can be bought at a dealer or gotten from a salvage yard
check www.car-parts.com for the nearest salvage yard if you want to go that route
my best to you
Posted on Aug 05, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 16, 2017 | Ford Cars & Trucks
Mar 23, 2017 | 2006 Chevrolet Monte Carlo
Feb 19, 2017 | Cars & Trucks
DOOR LKS fuse
Driver door lock actuator
Driver door lock switch
GMLAN serial data link
Keyless entry transmitter
Passenger door lock actuator
Passenger door lock switch
Remote control door lock receiver (RCDLR)
The DR LCK fuse supplies battery voltage to the body control module (BCM) for the power door lock system. The BCM supplies and monitors a reference voltage to the driver and passenger door lock switches through the door lock switch lock/unlock signal circuit. Each door lock switch receives ground at G300 which is also the ground for the door lock and unlock relays located in the BCM. When a door lock switch is placed in the lock position, the reference voltage is switched to ground and the BCM senses 0.0 volts on the door lock/unlock signal circuit. When a door lock switch is placed in the unlock position, the reference voltage is switched to ground through a 1.5k ohm resistor that is internal to each of the door lock switches and the BCM senses approximately 2.9 volts on the door lock/unlock signal circuit. The BCM interprets what position the activated door lock switch was placed in based on the voltage drop.
The BCM, upon receipt of a lock or unlock switch signal, will switch the appropriate door lock/unlock relay coil control circuit to ground causing the appropriate door lock/unlock relay to energize. With the relay energized, voltage is applied to the door lock actuator control circuit causing the door to either lock, or unlock depending on what command was received from the power door lock switch or remote control door lock receiver (RCDLR). When a power door lock/unlock relay is not energized, the switch contacts are normally grounded through the BCM which provides ground to the appropriate door lock actuator for the lock/unlock function being performed. The power door lock/unlock functions are performed by reversing the flow of voltage through the door lock actuator control circuits. The BCM has three internal drivers for the power door lock system. Driver door unlock, passenger door unlock and all door lock. This is done to isolate the driver door lock actuator so it can be unlocked separately from the passenger door. For additional information concerning keyless entry, refer to Keyless Entry System Description and Operation.
This is one you may want to take to dealer or some other ASE certified repair shop ! To do this right you need a Tech 2 scan tool !
Ignition ON, observe the scan tool Door Lock Switch parameter while using the driver and passenger door lock switches. The parameter should change from Idle to Lock and Unlock.
If the value does not change, refer to Door Lock Switch Malfunction.
Command the doors to LOCK and UNLOCK with the scan tool, the door lock actuators should LOCK and UNLOCK when changing between the commanded states.
If one or more doors do not LOCK or UNLOCK, refer to Door Lock Malfunction.
Aug 12, 2015 | 2009 Pontiac Solstice Convertible
May 19, 2017 | Cars & Trucks
Apr 12, 2017 | Ford Mustang Cars & Trucks
Dec 13, 2010 | 2008 GMC Sierra 2500HD 2WD
Jun 05, 2010 | 1997 Ford Windstar
Mar 29, 2010 | 2004 Mazda 6
May 04, 2017 | 1998 GMC Jimmy
261 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: