my BMW 5 Series F10/F11 (2010-2017) windshield wipers won't turn off

BMW 5 Series F10/F11 (2010-2017)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

503 words

Problem Statement

The windshield wipers on a BMW 5 Series F10/F11 (2010-2017) are malfunctioning by not turning off when the wiper switch is disengaged.

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts.

Symptoms

•Windshield wipers continuously operate regardless of switch position
•Wiper fluid may spray unexpectedly
•Wipers operate at full speed even when set to intermittent
•Possible "wiper motor" warning light on dashboard (if applicable)
•Electrical noise or clicking from the wiper motor area

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics using an OBD-II scanner for any relevant error codes.
2
Inspect the wiper switch for physical damage or wear.
3
Check the wiper relay in the fuse box for malfunction or signs of burning.
4
Test the wiper motor for proper electrical function using a multimeter.
5
Inspect wiring harnesses for shorts or corrosion that may cause continuous power to the motor.
6
Check the Body Control Module (BCM) for software issues or faults.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Flathead screwdriver
•Electrical contact cleaner

Parts Required

•Wiper relay
•Wiper switch (if faulty)
•Wiper motor (if faulty)

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Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics using an OBD-II scanner for any relevant error codes.
2
Inspect the wiper switch for physical damage or wear.
3
Check the wiper relay in the fuse box for malfunction or signs of burning.
4
Test the wiper motor for proper electrical function using a multimeter.
5
Inspect wiring harnesses for shorts or corrosion that may cause continuous power to the motor.
6
Check the Body Control Module (BCM) for software issues or faults.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, flathead screwdriver, and electrical contact cleaner.
Disconnect the battery to ensure safety while working on electrical components.

2. Replace Wiper Relay

Locate the fuse box, typically found under the dashboard or in the engine compartment.
Use a socket set to remove the cover of the fuse box.
Identify the wiper relay (refer to the fuse box diagram).
Remove the faulty relay by gently pulling it out.
Install a new relay, ensuring it is seated properly.

3. Repair or Replace Wiper Switch

Remove the steering wheel cover (if necessary) using a flathead screwdriver.
Disconnect the wiper switch from the steering column.
Inspect the switch for wear or damage. If faulty, replace it with a new switch.
Reconnect the new wiper switch and reassemble the steering column cover.

4. Inspect and Test Wiper Motor

Reconnect the battery.
Test the wiper motor by activating the wiper switch in various positions.
If the motor still fails to turn off, remove it from the wiper assembly.
Inspect the motor for damage or corrosion. Clean connections with electrical contact cleaner.
If necessary, replace the wiper motor with a new unit.