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 Mercury MarauderFACTORY OEM SERVICE PROCEDURE
Rear Window Defogger
REAR WINDOW DEFOGGER (LIGHTING CONTROL MODULE) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU is Defective | LCM | INSTALL a new LCM. GO to MULTIFUNCTION ELECTRONIC MODULES . |
| B1343 | Heated Back Light Input Circuit Failure | LCM | Go To PINPOINT TEST E . |
| B1344 | Heated Back Light Input Circuit Open | LCM | Go To PINPOINT TEST E . |
| B1345 | Heated Back Light Input Circuit Short to Ground | LCM | Go To PINPOINT TEST E . |
Factory Service Tools
Use the Manual With the Right Hardware
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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.