WARNING: This page is about a different car, the 1997 Mercury Grand Marquis and 1997 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect Black 16-pin lighting control module connector C2027 (located under instrument panel to right of steering column). Measure resistance between DLC pin No. 7 (Light Blue/White wire) and lighting control module connector C2027 pin No. 16 (Yellow/Black wire). See Figure and Fig 1. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Light Blue/White wire. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
With lighting control module C2027 still disconnected, inspect connector C2027 pin No. 16 for damage or bad wire connection. If pin and wire connection is okay, go to next step. If pin or wire connection is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.
With lighting control module C2027 still disconnected, inspect lighting control module pin No. 16 for damage. If pin is okay, replace lighting control module. If pin is damaged, repair as necessary. Reconnect connectors. Repeat DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS.

Fig 1: Identifying Lighting Control Module Connector C2027 Terminals

Courtesy of FORD MOTOR CO.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Test F: Lighting Control Module (LCM) Does Not Respond

Use the Manual With the Right Hardware

When to See a Mechanic

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