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 MANUALSMERCURY1999SABLE LS, 4D SEDAN, 3.0 SREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTHEATED GLASS/DEFOGGERSREAR WINDOW DEFOGGER SYSTEMDIAGNOSTIC TROUBLE CODE (DTC) TESTSDTC B1349: DEFOGGER CIRCUIT SHORT TO POWER
1999 Mercury Sable LS, 4D Sedan, 3.0 S
DTC B1349: Defogger Circuit Short To Power
1999 Mercury Sable LS, 4D Sedan, 3.0 SSECTION DTC B1349: Defogger Circuit Short To Power
- Remove rear window defogger relay. Measure voltage between ground and defogger relay harness connector pin No. 85. See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, replace rear window defogger relay.
- Unplug 19-pin harness connector from Generic Electronic Module (GEM), located in interior fuse panel. Measure voltage between ground and rear defogger relay connector terminal No. 85. See Figure . If battery voltage exists, replace fuse panel. If battery voltage does not exist, replace GEM and recheck for DTCs.
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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.