my Tesla Outback's windshield wipers won't turn off, how to fix this

Subaru Outback 5th Generation (2015-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

501 words

Problem Statement

Learn how to diagnose and fix windshield wipers that won't turn off in Tesla Outback. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid shock.
•Allow the vehicle to cool down if any components were recently used.

Symptoms

•Windshield wipers continuously running
•Wiper control stalk not responding
•Water and debris not being cleared properly
•Possible drain on battery due to continuous wiper operation
•Error messages on the dashboard related to wiper operation

Diagnostic Steps

1
Inspect the wiper control stalk for physical damage or obstructions.
2
Check the vehicle's fuse box for a blown fuse related to the wiper system.
3
Use an OBD-II scanner to check for error codes that may indicate a malfunction in the wiper control module.
4
Verify the wiper motor connection and wiring for any signs of damage or corrosion.
5
Test the wiper relay for functionality using a multimeter.

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

•Screwdriver set
•OBD-II scanner
•Multimeter
•Socket set

Parts Required

•Wiper control stalk (if replacement is necessary)
•Wiper relay (if defective)
•Wiper motor (if found faulty)

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Diagnostic Steps

1
Inspect the wiper control stalk for physical damage or obstructions.
2
Check the vehicle's fuse box for a blown fuse related to the wiper system.
3
Use an OBD-II scanner to check for error codes that may indicate a malfunction in the wiper control module.
4
Verify the wiper motor connection and wiring for any signs of damage or corrosion.
5
Test the wiper relay for functionality using a multimeter.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the ignition off.
Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Wiper Control Stalk

Tools Required: Screwdriver set, replacement wiper control stalk (if necessary)
Remove the steering column cover using the screwdriver.
Disconnect the wiper control stalk connector.
Check for continuity using a multimeter. If faulty, replace with a new stalk.
Reassemble the steering column cover.

3. Check and Replace Wiper Relay

Tools Required: Multimeter, replacement relay (if necessary)
Locate the wiper relay in the fuse box; refer to the owner's manual for exact location.
Test the relay for continuity with a multimeter.
If defective, remove the old relay and install the new one.
Reconnect the battery and test the wipers.

4. Inspect Wiper Motor and Wiring

Tools Required: Socket set, multimeter
Locate the wiper motor, typically under the cowl panel.
Disconnect the motor’s electrical connector.
Use a multimeter to test for power and ground at the motor connector while operating the wiper switch.
Inspect wiring for any damage or corrosion; repair or replace as necessary.
Reconnect everything and check if the wipers function correctly.