The BMW Service Information (SI) bulletin B61 09 12 appears to address various malfunctions that occur when operating the windshield wipers and is related to general electrical systems. Malfunctions related to windshield wipers can be caused by a range of electrical and mechanical issues. Here are some general steps to address wiper malfunctions:
**1. Check for Fault Codes:**
- Use a diagnostic scanner compatible with BMW to check for any stored fault codes in the vehicle's control modules related to the wipers or general electrical systems. These codes can provide valuable information about the issue.
**2. Inspect Wiper Blades and Arms:**
- Ensure that the wiper blades are in good condition and securely attached to the wiper arms. Damaged or worn wiper blades can cause streaking or poor visibility.
**3. Clean the Windshield:**
- A dirty or contaminated windshield can affect wiper performance. Clean the windshield thoroughly to remove any debris, bugs, or residue.
**4. Check Wiper Fuse and Relay:**
- Inspect the fuse and relay associated with the windshield wipers. If a fuse is blown or a relay is faulty, it can result in wiper malfunctions.
**5. Test Wiper Motor:**
- Test the functionality of the windshield wiper motor. If the motor is malfunctioning, it may need to be replaced.
**6. Inspect Wiper Linkage and Linkage Bushings:**
- The wiper linkage connects the wiper motor to the wiper arms. Inspect the linkage for damage or wear, and replace any damaged components, including linkage bushings.
**7. Verify Wiper Switch Operation:**
- Ensure that the wiper switch on the vehicle's stalk or control panel is functioning correctly. A faulty switch can prevent wiper operation.
**8. Examine Wiring and Connections:**
- Carefully inspect the wiring harnesses, connectors, and grounds related to the wiper system. Loose or corroded connections can lead to electrical issues.
**9. Address Control Module Issues:**
- If fault codes indicate issues with the wiper control module, follow diagnostic procedures to determine whether the module needs replacement or reprogramming.
**10. Lubricate Wiper Mechanism:**
- Lubricate the wiper linkage and pivot points to ensure smooth wiper operation.
**11. Ensure Proper Wiper Blade Size:**
- Verify that the wiper blades are the correct size for your vehicle. Using incorrect blade sizes can lead to poor performance.
**12. Perform Software Updates:**
- In some cases, software updates may be available to address wiper-related issues. Consult with a BMW dealership or authorized service center to check for updates.
**13. Consult a Professional:**
- If you are unable to diagnose or address the wiper malfunctions yourself, or if the issues persist after performing basic checks, it's advisable to seek assistance from a qualified BMW technician or an automotive repair shop with expertise in BMW vehicles. They can perform in-depth diagnostics and repairs as needed.
