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.
2005 Lincoln LS 3.0 SFACTORY OEM SERVICE PROCEDURE
Exterior Lighting
FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | FEM | CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved, INSTALL a new FEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| B1567 | Lamp Headlamp High-Beam Circuit Failure | FEM | If high beam is inoperative, GO to PINPOINT TEST D . If high beam is always on, GO to PINPOINT TEST E . |
| B1794 | Lamp Headlamp Low-Beam Circuit Failure | FEM | If low beam is inoperative, GO to PINPOINT TEST C . If low beam is always on, GO to PINPOINT TEST E . |
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | Instrument cluster | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster Self-Test. INSTALL a new instrument cluster if DTC B1342 is retrieved again. REFER to INSTRUMENT CLUSTER . |
| B1470 | Lamp Headlamp Input Circuit Failure | Instrument cluster | GO to PINPOINT TEST E . |
| B1567 | Lamp Headlamp High-Beam Circuit Failure | Instrument cluster | GO to PINPOINT TEST B . |
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU is defective | Instrument cluster | CLEAR AND DOCUMENT THE DTCs. CARRY OUT the instrument cluster self-test. INSTALL a new instrument cluster if DTC B1342 is retrieved again. REFER to INSTRUMENT CLUSTER . |
| B1470 | Lamp Headlamp Input Circuit Failure | Instrument Cluster | GO TO PINPOINT TEST E . |
STOPLAMPS DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | REM | CLEAR and DOCUMENT the DTCs. CARRY OUT the REM self-test. INSTALL a new REM if DTC B1342 is retrieved again. REFER to MODULE COMMUNICATIONS NETWORK . |
| B1483 | Brake Pedal Input Circuit Failure | REM | GO to PINPOINT TEST O . |
FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | FEM | CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved, INSTALL a new FEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| B1499 | Lamp Turn Signal Left Circuit Failure | FEM | If inoperative, GO to PINPOINT TEST Q . If always on, GO to PINPOINT TEST R . |
| B1501 | Lamp Turn Signal Left Circuit Short to Battery | FEM | GO to PINPOINT TEST Q . |
| B1503 | Lamp Turn Signal Right Circuit Failure | FEM | If inoperative, GO to PINPOINT TEST Q . If always on, GO to PINPOINT TEST R . |
| B1505 | Lamp Turn Signal Right Circuit Short to Battery | FEM | GO to PINPOINT TEST Q . |
REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | REM | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster self-test. INSTALL a new REM if DTC B1342 is retrieved again. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
| B1499 | Lamp Turn Signal Left Circuit Failure | REM | If inoperative, GO to PINPOINT TEST Q . If always on, GO to PINPOINT TEST R . |
| B1501 | Lamp Turn Signal Left Circuit Short to Battery | REM | GO to PINPOINT TEST Q . |
| B1503 | Lamp Turn Signal Right Circuit Failure | REM | If inoperative, GO to PINPOINT TEST Q . If always on, GO to PINPOINT TEST R . |
| B1505 | Lamp Turn Signal Right Circuit Short to Battery | REM | GO to PINPOINT TEST Q . |
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | Instrument cluster | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster Self-Test. INSTALL a new instrument cluster if DTC B1342 is retrieved again. REFER to INSTRUMENT CLUSTER . |
| B1875 | Turn Signal/Hazard Switch Signal Circuit Failure | Instrument cluster | GO to PINPOINT TEST S . |
FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | FEM | CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved, INSTALL a new FEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | REM | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster self-test. INSTALL a new REM if DTC B1342 is retrieved again. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | Instrument cluster | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster Self-Test. INSTALL a new instrument cluster if DTC B1342 is retrieved again. REFER to INSTRUMENT CLUSTER . |
| B1470 | Lamp Headlamp Input Circuit Failure | Instrument cluster | GO to PINPOINT TEST E . |
FRONT ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | FEM | CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved, INSTALL a new FEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | Instrument cluster | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster Self-Test. INSTALL a new instrument cluster if DTC B1342 is retrieved again. REFER to INSTRUMENT CLUSTER . |
| B2472 | Fog Lamp Switch Failure | Instrument cluster | GO to PINPOINT TEST X . |
REAR ELECTRONIC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Source | Perform Test |
|---|---|---|---|
| B1342 | ECU Is Defective | REM | CLEAR and DOCUMENT the DTCs. CARRY OUT the instrument cluster self-test. INSTALL a new REM if DTC B1342 is retrieved again. REFER to MULTIFUNCTION ELECTRONIC MODULES . |
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.
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