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.
2002 Lincoln Navigator RWDFACTORY OEM SERVICE PROCEDURE
Wiper/Washer Systems DTCS
WIPER/WASHER SYSTEMS DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Perform Test |
|---|---|---|
| B1240 | Rear Washer Pump Relay Coil Circuit Failure | J |
| B1241 | Rear Washer Pump Relay Coil Short To Power | J |
| B1342 | GEM Is Defective | Using NGS tester clear DTCs. Retrieve DTCs. If DTC B1342 is retrieved, replace GEM. See GENERIC ELECTRONIC MODULE |
| B1431 | Front Wiper Brake/Run Relay Circuit Failure | A |
| B1432 | Front Wiper Brake/Run Relay Short To Power | A |
| B1434 | Front Wiper Hi/Low Speed Relay Circuit Failure | C |
| B1436 | Front Wiper Hi/Low Speed Relay Circuit Short To Power | C |
| B1438 | Front Wiper Mode Select Switch Circuit Failure | A |
| B1441 | Front Wiper Mode Select Switch Input Short To Ground | A |
| B1446 | Front Wiper Park Sense Circuit Failure | D |
| B1450 | Front Wiper/Wash Interval Delay Switch Input Circuit Failure | A |
| B1453 | Front Wiper/Wash Interval Delay Switch Input Short To Ground | A |
| B1454 | Low Washer Fluid Indicator Circuit Failure | L |
| B1456 | Low Washer Fluid Indicator Circuit Short To Power | L |
| B1458 | Front Wiper/Washer Pump Motor Relay Circuit Failure | E |
| B1460 | Front Wiper/Washer Pump Motor Relay Coil Short To Power | E |
| B1466 | Front Wiper Hi/Low Speed Not Switching | C |
| B1473 | Front Wiper Motor Low Speed Circuit Failure | C |
| B1476 | Front Wiper Motor High Speed Circuit Failure | C |
| B1611 | Rear Wiper Mode Select Switch Circuit Failure | G |
| B1614 | Rear Wiper Mode Select Switch Circuit Short To Ground | K |
| B1814 | Rear Wiper Motor Down Relay Circuit Failure | G |
| B1816 | Rear Wiper Motor Down Relay Coil Circuit Short To Power | G |
| B1818 | Rear Wiper Motor Up Relay Coil Circuit Failure | G |
| B1820 | Rear Wiper Motor Up Relay Circuit Short To Power | G |
| B1839 | Rear Wiper Motor Circuit Failure | H |
| B1840 | Front Wiper Power Circuit Failure | A |
| B1894 | Rear Wiper Motor Speed Sense Circuit Failure | G |
| P0500 | Vehicle Speed Signal Circuit Failure | F |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.