Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Lincoln Town Car Protection SeriesFACTORY OEM SERVICE PROCEDURE
Lighting Control Module (LCM) Diagnostic Trouble Code (DTC) List
LIGHTING CONTROL MODULE (LCM) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | DTC Caused By | Perform Test |
|---|---|---|---|
| B1352 | Ignition Key-In-Ckt Failure | LCM | Go To PINPOINT TEST A: THE INTERIOR LAMPS ARE INOPERATIVE . |
| B1520 | Hood Switch Circuit Open | LCM | Go To PINPOINT TEST C: THE DEMAND LIGHTING IS INOPERATIVE . |
| B1688 | Dome Lamp Input Short to Ground | LCM | Go To PINPOINT TEST B: THE INTERIOR LAMPS STAY ON CONTINUOUSLY . |
Factory Service Tools
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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.