Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .

DTC INDEX

DTC	Description	Action
B1008:23	Wiper Mode Switch: Signal Stuck Low	INSTALL a new wiper/washer switch. REFER to: Steering Column Multifunction Switch RH . CLEAR the DTCs and WAIT 10 seconds. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new SASM. REFER to: Steering Angle Sensor Module (SASM) .
B1051:92	Front Washer Switch: Performance or Incorrect Operation	INSTALL a new wiper/washer switch. REFER to: Steering Column Multifunction Switch RH . CLEAR the DTCs and WAIT 10 seconds. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new SASM. REFER to: Steering Angle Sensor Module (SASM) .
B1052:92	Rear Washer Switch: Performance or Incorrect Operation	INSTALL a new wiper/washer switch. REFER to: Steering Column Multifunction Switch RH . CLEAR the DTCs and WAIT 10 seconds. REPEAT the self-test. If the DTC is retrieved again, INSTALL a new SASM. REFER to: Steering Angle Sensor Module (SASM) .
B1087:86	LIN Bus "A": Signal Invalid	If the exterior lamps are on, REFER to: Headlamps . If the exterior lamps are not on, GO to Pinpoint Test B
B1087:88	LIN Bus "A": Bus off	REFER to: Headlamps .
B10AD:04	Rain Sensor: System Internal Failure	INSTALL new rain sensor.
B10AD:06	Rain Sensor: Algorithm Based Failure	INSTALL new rain sensor.
B10AD:83	Rain Sensor: Value of Signal Protection Calculation Incorrect	GO to Pinpoint Test E
B112B:87	Steering Wheel Module: Missing Message	GO to Pinpoint Test B
B1131:55	Wiper Motor Module: Not Configured	PERFORM the PMI for the BCM using As-Built data.
B1131:87	Wiper Motor Module: Missing Message	GO to Pinpoint Test A
B129A:86	LIN Bus "D": Signal Invalid	GO to Pinpoint Test A
B1C77:12	Rear Wiper Relay: Circuit Short To Battery	For vehicles with a liftgate, GO to Pinpoint Test I For vehicles with rear cargo doors, GO to Pinpoint Test J
B1C77:14	Rear Wiper Relay: Circuit Short To Ground or Open	If the rear window wiper is inoperative: For vehicles with a liftgate, GO to Pinpoint Test I For vehicles with rear cargo doors, GO to Pinpoint Test J If the rear window wiper(s) stays on continuously: For vehicles with a liftgate, GO to Pinpoint Test K For vehicles with rear cargo doors, GO to Pinpoint Test L
B1D38:16	Front Wiper Motor: Circuit Voltage Below Threshold	GO to Pinpoint Test A
B1D38:17	Front Wiper Motor: Circuit Voltage Above Threshold	GO to Pinpoint Test A
B1D38:19	Front Wiper Motor: Circuit Current Above Threshold	GO to Pinpoint Test A
B1D38:96	Front Wiper Motor: Component Internal Failure	If only the passenger side windshield wiper motor is inoperative, INSTALL a new passenger side windshield wiper motor. REFER to: Windshield Wiper Motor (501-16 Wipers and Washers, Removal and Installation). If both windshield wiper motors are inoperative, INSTALL a new driver side windshield wiper motor. REFER to: Windshield Wiper Motor .
U0231:00	Lost Communication With Rain Sensing Module: No Sub Type Information	GO to Pinpoint Test E
All other Diagnostic Trouble Codes (DTCs)	-	REFER to: Body Control Module (BCM) .

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.

Safety Warning

Wiper System And Washer System DTCS

Use the Manual With the Right Hardware

When to See a Mechanic

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