Wiper Motor Rear Circuit Malfunction
What does B1111 mean?
The B1111 code means the vehicle's onboard diagnostic system has detected: Wiper Motor Rear Circuit Malfunction. This is a low severity code.
Common Symptoms
- Rear wiper does not operate
- Rear wiper stuck in one position
- Rear wiper motor runs but blade does not move
- Rear wiper switch has no effect
- Rear washer works but wiper does not
Probable Causes (Ranked by Likelihood)
- Failed rear wiper motor Very High
- Stripped rear wiper drive spline High
- Faulty rear wiper switch Moderate
- Wiring break at liftgate hinge area Low
Step-by-Step Diagnostic Procedure
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Test rear wiper switch operation
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Check voltage at rear wiper motor connector
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Inspect rear wiper arm spline for stripping
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Check wiring through liftgate hinge boot
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Test rear wiper motor with direct power
Frequently Asked Questions
Why do rear wiper motor wires break?
The wiring to the rear wiper runs through the liftgate hinge area and flexes every time the liftgate is opened or closed. Over thousands of cycles, wires can fatigue and break inside the insulation.
What is a stripped wiper drive spline?
The wiper arm attaches to the motor shaft via a splined (grooved) connection. If the splines strip from over-tightening or corrosion, the motor spins but the arm does not move.
Can I just remove the rear wiper if I do not use it?
You can remove the wiper arm and install a delete plug to cover the hole, but this may not be legal in all areas and will reduce rear visibility in wet conditions.