How to remove and install the Lighting Control Module on Mercury Grand Marquis?

The first step to remove the Lighting Control Module (LCM) is disconnecting the battery ground cable. Move on to the removal process of the left-hand instrument panel lower insulator which requires you to detach the pin-type retainers followed by disconnecting the courtesy lamp. Remove the LCM from vehicles with adjustable pedals by first uninstalling the accelerator pedal and extending shaft then position the LCM nearby. A person must remove screws and push the locking tab to detach electrical connectors after which they can extract the LCM. Install the LCM by undoing the removal steps then examine its proper functionality.

How to properly handle the Lighting Control Module in a Mercury Grand Marquis?

Service of the Lighting Control Module (LCM) starts with uploading module configuration information to a scan tool because this data needs downloading into the new module following installation. The new LCM enters manufacturing mode through arrival with a default DTC B2477 that clears upon establishing necessary programming. If necessary, clear DTC B2477 after configuration. Start the process by removing the pin-type retainers before placing the LH instrument panel lower insulator aside. Starting with the courtesy lamp disconnected one should pull out the LH instrument panel lower insulator. Follow step one by taking away the accelerator pedal and use a screwdriver to remove the two attachment screws from the LCM before placing it aside. Detach the locking tabs before disconnecting electrical plugs to separate the LCM. Install the new module before retrieving configuration data from the scan tool to transfer into the module. The installation process should finish by following all steps in reverse order.

OEM Mercury Grand Marquis Lighting Control Module

Lamp Control Module

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7 Lighting Control Modules found

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Mercury Grand Marquis Lighting Control Module Part Number: 5W7Z-13C788-AD
$368.33 MSRP: $630.00
You Save: $261.67 (42%)
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Product Specifications
- Other Name: Processor - Lighting Control
- Replaces: 5W7Z-13C788-AA, 5W7Z-13C788-AC, LCM-2
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005 Mercury Grand Marquis | GS, GSL, Limited Edition, LS, Ultimate Edition | 4.6L V8, 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Lighting Control Module Part Number: 4W7Z-13C788-BD
$269.37 MSRP: $447.27
You Save: $177.90 (40%)
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Product Specifications
- Other Name: Processor - Lighting Control
- Replaces: 4W7Z-13C788-BB, 4W7Z-13C788-BC, LCM-1
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2004 Mercury Grand Marquis | GS, LS, LSE | 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Lighting Control Module Part Number: FW1Z-13C788-ARM
$110.86 MSRP: $174.36
You Save: $63.50 (37%)
Product Specifications
- Other Name: Remanufactured Processor - Lighting Control
- Replaces: 6W1Z-13C788-BA, 7W1Z-13C788-A, LCM-3
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2006-2007 Mercury Grand Marquis | GS, LS | 4.6L V8, 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Lighting Control Module Part Number: XW7Z-13C788-BA
Product Specifications
- Other Name: Processor - Lighting; Module - Lighting Control
- Replaces: F8AZ-13C788-BA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1998-2000 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Lighting Control Module Part Number: F6AZ-13C788-AE
Product Specifications
- Other Name: Control Unit
- Manufacturer Note: Incl.police vehicle
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1995-1997 Mercury Grand Marquis | GS, LS | 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Lighting Control Module Part Number: 8W7Z-13C788-C
Product Specifications
- Other Name: Processor - Lighting Control; Module - Lighting Control
- Manufacturer Note: Service Kit
- Replaces: 8W7Z-13C788-B, 8W7Z-13C788-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2008-2011 Mercury Grand Marquis | GS, LS | 4.6L V8, 8 Cyl 4.6 L FLEX, 8 Cyl 4.6 L GAS
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Mercury Grand Marquis Lighting Control Module Part Number: 1W7Z-13C788-BC
Product Specifications
- Other Name: Processor - Lighting Control
- Replaces: 1W7Z-13C788-BB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2002 Mercury Grand Marquis | GS, LS | 4.6L V8, 8 Cyl 4.6 L GAS

Mercury Grand Marquis Lighting Control Module

OEM Lighting Control Module boasts unmatched quality. Each part goes through full quality checks. They adhere to Mercury's official factory standards. These steps remove flaws and inconsistencies. So you can get Lighting Control Module with long life and a perfect fit. Come to our website and find genuine Mercury Grand Marquis parts. We keep a wide inventory of OEM Grand Marquis parts at the highly affordable prices. It's easy to search, compare, and pick what you need. You'll love the clear info and simple checkout. We offer top-rated customer service, and we reply fast. We also ship promptly to ensure your order arrives on time.

The Lighting Control Module of Mercury Grand Marquis controls the vehicle's exterior lamps, interior lamps, switching of head lamps and tail lamps as well as indicators and cabin lamps. This electronic device receives information from switches and sensors, and sends the necessary command through relays so that low current control signals operate higher current lighting circuits. The Lighting Control Module is the controller for every exterior lamp event under the Mercury Grand Marquis platform. The white multi-pin connector on the main control board connects the module to the car with 8-32 hex head screws. Additional gray bullet terminal wires connect the module to the main wire harness. The lighting plug connects at a dedicated socket on the lower side of its control plate; the toggle switch, which has been installed in the driver's front panel, enables selection of functions. If the Lighting Control Module fails, the lighting will operate erratically until a replacement Lighting Control Module is installed on Mercury Grand Marquis. The Lighting Control Module coordinates automatic lighting and dimming of various lights without the direct involvement and action of the driver when functioning as designed. The lights of the Mercury Grand Marquis should respond appropriately to the conditions.

Mercury Grand Marquis Lighting Control Module Parts and Q&A

Lighting Control Module
4W7Z-13C788-BD
Q: How to remove and install the Lighting Control Module on Mercury Grand Marquis?
A:
The first step to remove the Lighting Control Module (LCM) is disconnecting the battery ground cable. Move on to the removal process of the left-hand instrument panel lower insulator which requires you to detach the pin-type retainers followed by disconnecting the courtesy lamp. Remove the LCM from vehicles with adjustable pedals by first uninstalling the accelerator pedal and extending shaft then position the LCM nearby. A person must remove screws and push the locking tab to detach electrical connectors after which they can extract the LCM. Install the LCM by undoing the removal steps then examine its proper functionality.
Lighting Control Module
FW1Z-13C788-ARM
Q: How to properly handle the Lighting Control Module in a Mercury Grand Marquis?
A:
Service of the Lighting Control Module (LCM) starts with uploading module configuration information to a scan tool because this data needs downloading into the new module following installation. The new LCM enters manufacturing mode through arrival with a default DTC B2477 that clears upon establishing necessary programming. If necessary, clear DTC B2477 after configuration. Start the process by removing the pin-type retainers before placing the LH instrument panel lower insulator aside. Starting with the courtesy lamp disconnected one should pull out the LH instrument panel lower insulator. Follow step one by taking away the accelerator pedal and use a screwdriver to remove the two attachment screws from the LCM before placing it aside. Detach the locking tabs before disconnecting electrical plugs to separate the LCM. Install the new module before retrieving configuration data from the scan tool to transfer into the module. The installation process should finish by following all steps in reverse order.