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.
2018 Ford Focus SEL, 4D HatchbackFACTORY OEM SERVICE PROCEDURE
Wipers & Washers System DTCS
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 | If the exterior lamps are on, REFER to: Headlamps
. If the exterior lamps are not on, GO to Pinpoint Test B |
| B112B:87 | Steering Wheel Module: Missing Message | GO to Pinpoint Test B |
| B1131:55 | Wiper Motor Module: Not Configured | DIAGNOSE all other DTCs first. If no other DTCs are present, INITIALIZE the windshield wiper motors. REFER to: Windshield Wiper Motor Initialization . |
| B1131:83 | Wiper Motor Module: Value of Signal Protection Calculation Incorrect | DIAGNOSE all other Diagnostic Trouble Codes (DTCs) first. CLEAR the Diagnostic Trouble Codes (DTCs). WAIT 10 seconds and REPEAT the BCM self-test. If DTC B1131:83 returns, INSTALL a new driver side windshield wiper motor. |
| B1131:87 | Wiper Motor Module: Missing Message | GO to Pinpoint Test A |
| B129A:86 | LIN Bus "D": Signal Invalid | GO to Pinpoint Test A |
| B129A:88 | LIN Bus "D". Bus off | GO to Pinpoint Test A |
| B1C77:11 | Rear Wiper Relay: Circuit Short To Ground | GO to Pinpoint Test H |
| B1C77:12 | Rear Wiper Relay: Circuit Short To Battery | GO to Pinpoint Test G |
| B1C77:13 | Rear Wiper Relay: Circuit Open | GO to Pinpoint Test G |
| B1C77:14 | Rear Wiper Relay: Circuit Short To Ground or Open | If the rear window wiper is inoperative, GO to Pinpoint Test G If the rear window wiper stays on continuously, GO to Pinpoint Test H |
| B1C77:19 | Rear Wiper Relay: Circuit Current Above Threshold | GO to Pinpoint Test G |
| 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
. If both windshield wiper motors are inoperative, INSTALL a new driver side windshield wiper motor. REFER to: Windshield Wiper Motor . |
| All other Diagnostic Trouble Codes (DTCs) | - | REFER to: Body Control Module (BCM) . |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.