Do you know anything about automotive electronic's , control module's etc....
work including the truck.???? trunk ?
Electronic control module ( DDM ) driver door module control's lock's an power windows . Do you have a professional or factory scanner to test for DTC'S - diagnostic trouble code's ? Do you know what diagnostic pin point testing procedures are ?
Power Locks
The power lock/unlock feature requests all of the vehicle doors to lock or unlock upon a request from the door lock control switch, the RKE keypad, or the RKE transmitter. Power locking and unlocking functions independently of the key position, vehicle speed, or transmission position. The LCM and the DDM activate internal relays to supply the correct power and grounds for the door lock actuators
The DDM receives inputs from the digital transmission range (TR) sensor, ignition switch, brake switch, door lock control switches, lighting control module (LCM), RKE keypad and RKE transmitter. The DDM outputs consists of RKE keypad illumination, door lock actuators, luggage compartment lid release solenoid, and the LCM.
Inspection and Verification
WARNING: If equipped with fire suppression system, refer to Section 419-03 for important safety warnings.
NOTE: Before starting electrical diagnosis, check for mechanical binds by manually operating the door locks. Operate the lock system several times from each switch while observing the operation of all the door locks. Be sure the battery is fully charged.
Visual Inspection Chart
Mechanical
Electrical
SOURCE: 2007 Mercury Grand Marquis required oil weight
If u have a moderate climate, 10W-30W, if cold climate 5W-30W, do not use any heavier weight of oils.
SOURCE: power locks, and keyless entry pad do not work.
if the battery in the entry pad is good then it needs to be reprogramed or the remote sensor is blowen
SOURCE: my door lock remote will not function and new
have you tried to press/hold lock button for 30 secs.
the code changes everytime you use the remote so that only your remote unlocks your car,not everybody elses.the key has a code inbuilt into it so the car will only start with your key...(this is dealer programmable)
SOURCE: 2004 MERCURY GRAND MARQUIS ALL DOORS OPEN WITH
This sounds most like a worn lock actuator which wouldn't be uncommon. If you need a diagram on how to replace, let me know.
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