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 SYSTEMSELF-DIAGNOSTIC SYSTEMPRELIMINARY PROCEDURE

1999 Mercury Sable LS, 4D Sedan, 3.0 S

Preliminary Procedure

1999 Mercury Sable LS, 4D Sedan, 3.0 SSECTION Preliminary Procedure

Verify customer complaint by operating rear window defogger system. Check fuses No. 5 (5-amp) and No. 32 (10-amp) in fuse junction panel. Check MAXI fuses in battery junction box. Check for loose or corroded connectors, or damaged wiring harness. Repair or replace components as necessary.
If concern remains after checking fuses and wiring harness, perform self-diagnostics on the Generic Electronic Module (GEM). Self-diagnostics are carried out using Rotunda New Generation Star (NGS) tester. See appropriate MODULE COMMUNICATIONS NETWORK article for further information.
If self-diagnostics is complete and DTCs are retrieved, go to appropriate DTC test under DIAGNOSTIC TROUBLE CODE (DTC) TESTS . If a DTC is retrieved from GEM and the appropriate DTC test is not in this article, refer to GENERIC ELECTRONIC MODULE (GEM) DTC INDEX table. The DTC table will direct you to correct article to find appropriate test procedure.
If no DTCs are retrieved, perform wiggle test. Wiggle sections of wiring harness while attempting to retrieve DTCs. If DTC is set while wiggling section of harness or connectors, inspect components and repair or replace as necessary.
If a communication problem exists with GEM, see appropriate MODULE COMMUNICATIONS NETWORK article for data bus diagnostics and repair procedures.

GENERIC ELECTRONIC MODULE (GEM) DTC INDEX

DTC

Source Module

Description

B1302

GEM

⁽¹⁾⁽³⁾ Delayed Accessory Relay Coil Circuit Failure

B1304

GEM

⁽¹⁾⁽²⁾ Delayed Accessory Relay Coil Circuit Short To Battery

B1309

GEM

⁽²⁾⁽³⁾ Power Door Lock Sense Circuit Short To Ground

B1310

GEM

⁽³⁾ Power Door Unlock Circuit Failure

B1314

GEM

⁽⁴⁾ Battery Saver Relay Coil Circuit Open

B1315

GEM

⁽⁴⁾ Battery Saver Relay Coil Circuit Short To Battery

B1316

GEM

⁽⁴⁾ Battery Saver Relay Coil Circuit Short To Ground

B1317

GEM

⁽²⁾⁽⁵⁾ Battery Voltage High

B1318

GEM

⁽²⁾⁽⁵⁾ Battery Voltage Low

B1319

GEM

⁽²⁾⁽⁴⁾ Driver Door Ajar Circuit Failure

B1322

GEM

⁽²⁾⁽⁴⁾ Driver Door Ajar Circuit Short To Ground

B1323

GEM

⁽⁶⁾ Door Ajar Light Circuit Failure

B1325

GEM

⁽⁶⁾ Door Ajar Light Circuit Short To Battery

B1327

GEM

⁽²⁾⁽⁴⁾ Passenger Door Ajar Circuit Failure

B1330

GEM

⁽²⁾⁽⁴⁾ Passenger Door Ajar Circuit Short To Ground

B1331

GEM

⁽²⁾⁽⁴⁾ Deck Lid Ajar Rear Door Circuit Failure

B1334

GEM

⁽²⁾⁽⁴⁾ Deck Lid Ajar Rear Door Circuit Short To Ground

B1335

GEM

⁽²⁾⁽⁴⁾ Right Rear Door Ajar Circuit Short To Ground

B1338

GEM

⁽²⁾⁽⁴⁾ Right rear Door Ajar Circuit Short To Ground

B1343

GEM

⁽²⁾ Heated Rear Window Input Circuit Failure

B1345

GEM

⁽²⁾⁽⁷⁾ Heated Rear Window Input Circuit Short To Ground

B1347

GEM

⁽⁷⁾ Heated Rear Window Relay Circuit Failure

B1349

GEM

⁽⁷⁾ Heated Rear Window Relay Circuit Short To Battery

B1352

GEM

⁽²⁾⁽⁸⁾ Ignition Key-In Circuit Failure

B1354

GEM

⁽²⁾⁽⁸⁾ Ignition Key-In Circuit Short To Ground

B1359

GEM

⁽²⁾⁽⁹⁾ Ignition RUN/ACC Circuit Failure

B1361

GEM

⁽²⁾⁽⁹⁾ Ignition RUN/ACC Circuit Short To Battery

B1363

GEM

⁽²⁾⁽⁹⁾ Ignition Start Circuit Failure

B1365

GEM

⁽²⁾⁽⁹⁾ Ignition Start Circuit Short To Battery

B1371

GEM

⁽⁴⁾ Illuminated Entry Relay Circuit Failure

B1373

GEM

⁽⁴⁾ Illuminated Entry Relay Short To Battery

B1397

GEM

⁽³⁾ Power Door Unlock Circuit Short To Battery

B1398

GEM

⁽¹⁾ Driver Door Window One Touch Relay Circuit Failure

B1400

GEM

⁽¹⁾ Driver Door Window One Touch Relay Circuit Short To Battery

B1402

GEM

⁽¹⁾⁽²⁾ Driver Door Window Down Switch Circuit Failure

B1403

GEM

⁽¹⁾⁽²⁾ Driver Door Window Up Switch Circuit Failure

B1405

GEM

⁽¹⁾⁽²⁾ Driver Door Window Down Circuit Short To Battery

B1408

GEM

⁽¹⁾⁽²⁾ Driver Door Window Up Circuit Short To Battery

B1410

GEM

⁽¹⁾⁽²⁾ Driver Door Window Motor Circuit Failure

B1426

GEM

⁽⁶⁾ Seat Belt Light Circuit Short To Battery

B1428

GEM

⁽⁶⁾ Seat Belt Lamp Circuit Failure

B1430

GEM

⁽²⁾⁽⁸⁾ Seat Belt Switch Circuit Short To Ground

B1432

GEM

⁽¹⁰⁾ Wiper Brake/Run Relay Circuit Short To Battery

B1433

GEM

⁽¹⁰⁾ Wiper Brake/Run Relay Circuit Short To Ground

B1434

GEM

⁽¹⁰⁾ Wiper HI/LO Speed Relay Coil Circuit Failure

B1436

GEM

⁽¹⁰⁾ Wiper HI/LO Speed Relay Coil Circuit Short To Battery

B1438

GEM

⁽²⁾⁽¹⁰⁾ Wiper Mode Select Switch Circuit Failure

B1441

GEM

⁽²⁾⁽¹⁰⁾ Wiper Mode Select Switch Circuit Short To Ground

B1446

GEM

⁽²⁾⁽¹⁰⁾ Wiper Park Sense Circuit Failure

B1448

GEM

⁽²⁾⁽¹⁰⁾ Wiper Park Sense Circuit Short To Battery

B1450

GEM

⁽²⁾⁽¹⁰⁾ Wiper/Washer Delay Switch Circuit Failure

B1453

GEM

⁽²⁾⁽¹⁰⁾ Wiper/Washer Delay Switch Circuit Short To Ground

B1458

GEM

⁽¹⁰⁾ Wiper/Washer Pump Motor Relay Circuit Failure

B1460

GEM

⁽¹⁰⁾ Wiper/Washer Pump Motor Relay Coil Circuit Short To Battery

B1462

GEM

⁽²⁾⁽⁸⁾ Seat Belt Switch Circuit Failure

B1465

GEM

⁽¹⁰⁾ Wiper Brake/Run Relay Circuit Open

B1466

GEM

⁽¹⁰⁾ Wiper HI/LO Speed Not Switching

B1474

GEM

⁽⁴⁾ Battery Saver Power Relay Circuit Short To Battery

B1475

GEM

⁽¹⁾ Delayed Accessory Relay Contact Short To Battery

B1555

GEM

⁽²⁾⁽⁹⁾ Ignition RUN/START Circuit Failure

B1557

GEM

⁽²⁾⁽⁹⁾ Ignition RUN/START Circuit Short To Battery

B1571

GEM

⁽²⁾⁽⁴⁾ Left Rear Door Ajar Circuit Failure

B1574

GEM

⁽²⁾⁽⁴⁾ Left Rear Door Ajar Circuit Short To Ground

B1575

GEM

⁽²⁾⁽⁹⁾ Parking Light Input Circuit Failure

B1577

GEM

⁽²⁾⁽⁹⁾ Parking Light Input Circuit Short To Battery

B1607

GEM

⁽²⁾⁽¹¹⁾ Illuminated Entry Input Circuit Failure

B1610

GEM

⁽²⁾⁽⁴⁾ Illuminated Entry Input Circuit Short To Ground

B1830

GEM

⁽²⁾⁽³⁾ Door Unlock/Disarm Switch Circuit Failure

B1833

GEM

⁽²⁾⁽³⁾ Door Unlock/Disarm Switch Circuit Short To Ground

B1834

GEM

⁽³⁾ Door Unlock/Disarm Switch Output Circuit Failure

B1836

GEM

⁽³⁾ Door Unlock/Disarm Switch Output Circuit Short To Battery

B1838

GEM

⁽⁴⁾ Battery Saver Power Relay Circuit Failure

B1840

GEM

⁽¹⁰⁾ Front Wiper Power Circuit Failure

C1898

GEM

⁽²⁾⁽¹²⁾ VAPS II Circuit Open

C1899

GEM

⁽²⁾⁽¹²⁾ VAPS II Circuit Short To Battery

C1928

GEM

⁽¹²⁾ VAPS II Solenoid Actuator Return Circuit Short To Ground

P1882

GEM

⁽⁸⁾ Engine Coolant Level Switch Circuit Short To Ground

P1883

GEM

⁽⁶⁾ Engine Coolant Level Light Circuit Failure

P1884

GEM

⁽⁶⁾ Engine Coolant Level Light Circuit Short To Battery

⁽¹⁾	See appropriate POWER WINDOWS article for test procedure.

⁽²⁾	This DTC may exist in GEM wiggle test.

⁽³⁾	See appropriate POWER DOOR LOCKS & TRUNK RELEASE article for test procedure.

⁽⁴⁾	See appropriate wiring diagram in ILLUMINATION/INTERIOR LIGHTS article.

⁽⁵⁾	See appropriate GENERATORS article in STARTING & CHARGING SYSTEMS for testing procedures.

⁽⁶⁾	See appropriate INSTRUMENT PANELS article for test procedure.

⁽⁷⁾	Perform appropriate DTC test under DIAGNOSTIC TROUBLE CODE (DTC) TESTS .

⁽⁸⁾	See appropriate wiring diagram in WARNING SYSTEMS article.

⁽⁹⁾	See appropriate STEERING COLUMN SWITCHES article for test procedure.

⁽¹⁰⁾	See appropriate WIPER/WASHER SYSTEMS article for test procedure.

⁽¹¹⁾	See appropriate REMOTE KEYLESS ENTRY SYSTEMS article for test procedure.

⁽¹²⁾	See appropriate ELECTRONIC article in STEERING for test procedure.

RENDER: 1.0x

NO RELATED

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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.