why do my BMW 5 Series windshield wipers not work?

BMW 5 Series G30/G31 (2017-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

486 words

Problem Statement

The windshield wipers on a BMW 5 Series are not functioning, which may be due to electrical issues, a faulty wiper motor, or problems with the wiper linkage.

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow the engine to cool before working on any components near the engine bay.

Symptoms

•Windshield wipers do not operate at all
•Wipers move erratically or intermittently
•Wipers stuck in a fixed position
•No sound from the wiper motor when activated
•Washer fluid not spraying when wipers are engaged

Diagnostic Steps

1
Inspect the wiper switch for continuity using a multimeter.
2
Check the fuse for the windshield wipers in the fuse box.
3
Examine the wiring and connectors leading to the wiper motor for damage or corrosion.
4
Test the wiper motor by applying direct power to it.
5
Inspect the wiper linkage for any physical obstructions or damage.

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

•Multimeter
•Fuse puller
•Socket set
•Screwdriver set

Parts Required

•Windshield wiper motor (if faulty)
•Wiper fuse (if blown)

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Diagnostic Steps

1
Inspect the wiper switch for continuity using a multimeter.
2
Check the fuse for the windshield wipers in the fuse box.
3
Examine the wiring and connectors leading to the wiper motor for damage or corrosion.
4
Test the wiper motor by applying direct power to it.
5
Inspect the wiper linkage for any physical obstructions or damage.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the battery to prevent any electrical shorts.
Ensure the vehicle is parked on a level surface.

2. Check and Replace the Fuse

Locate the fuse box (refer to the owner’s manual for the exact location).
Remove the fuse for the windshield wipers using a fuse puller.
Inspect the fuse; if it is blown, replace it with an identical amperage fuse.

3. Inspect and Repair Wiring

Visually inspect the wiring harness leading to the wiper motor for frays, breaks, or corrosion.
If damaged, repair the wiring using electrical tape or replace the harness if necessary.
Ensure all connectors are clean and securely connected.

4. Test and Replace the Wiper Motor

If the motor did not respond to direct power, remove it from the vehicle by:
- Disconnecting the electrical connector.
- Removing any retaining screws or bolts.
Install a new wiper motor by reversing the removal steps. Ensure it is securely fastened.
Reconnect the electrical connector.

5. Reassemble and Test

Reinstall any components that were removed during the repair.
Reconnect the battery.
Test the wipers by activating them from the switch to ensure proper function.