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.
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HOMESERVICE MANUALSLINCOLN2008NAVIGATOR RWDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXINSTRUMENT, MESSAGE CENTER, & WARNING CHIMES DTCSSMART JUNCTION BOX (SJB)
2008 Lincoln Navigator RWD
Smart Junction Box (SJB)
2008 Lincoln Navigator RWDSECTION Smart Junction Box (SJB)
SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1352 | Ignition Key-In Circuit Failure | If the chime sounds with the door ajar and no key in the ignition, go to Pinpoint Test AS
. If the key-in-ignition chime is inoperative, go to Pinpoint Test AT . |
| B2479 | Park Brake Switch Circuit Short to Ground | Go to Pinpoint Test M . |
| C1125 | Brake Fluid Level Sensor Input Circuit Failure | Go to Pinpoint Test M . |
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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.