my Tesla Outback's windshield wipers won't turn off, what should I check?

Subaru Outback 5th Generation (2015-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

565 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

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical components to prevent shock.

Symptoms

•Windshield wipers are continuously operating
•Wiper control stalk is unresponsive
•Dashboard warning lights may illuminate
•Possible water pooling in the wiper motor area
•Flickering wiper operation when switching settings

Diagnostic Steps

1
Inspect the wiper control stalk for physical damage or obstruction.
2
Scan the vehicle’s computer using an OBD-II scanner for any error codes related to the wiper system.
3
Check the fuse associated with the windshield wiper system for any signs of blowing or damage.
4
Inspect the wiper motor connections for corrosion or loose wiring.
5
Test the wiper relay operation by swapping it with a similar relay if available.
6
Verify the software version of the vehicle and check for any software updates regarding the wiper system.

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
•Fuse puller or needle-nose pliers
•Multimeter
•Screwdriver set

Parts Required

•Replacement wiper fuse
•Replacement wiper relay

Related Faults

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Diagnostic Steps

1
Inspect the wiper control stalk for physical damage or obstruction.
2
Scan the vehicle’s computer using an OBD-II scanner for any error codes related to the wiper system.
3
Check the fuse associated with the windshield wiper system for any signs of blowing or damage.
4
Inspect the wiper motor connections for corrosion or loose wiring.
5
Test the wiper relay operation by swapping it with a similar relay if available.
6
Verify the software version of the vehicle and check for any software updates regarding the wiper system.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shock.
Ensure the vehicle is on a flat surface and the wipers are in the "off" position.

2. Inspect and Replace Fuse

Locate the fuse box (refer to the owner’s manual for exact location).
Remove the cover and identify the fuse for the windshield wipers.
Use a fuse puller or pliers to remove the fuse and inspect it.
- If the fuse is blown, replace it with a new fuse of the same amperage (usually 10A or 15A).
Reinstall the fuse box cover and reconnect the battery.

3. Check and Replace Wiper Relay

Locate the relay for the windshield wipers in the fuse box (refer to the owner’s manual for specific location).
Remove the relay and test it by swapping with a similar relay in the fuse box.
If the wipers operate correctly with the swapped relay, replace the faulty relay.

4. Inspect Wiper Motor and Connections

Remove any covers or panels obstructing access to the wiper motor.
Disconnect the wiring harness from the wiper motor.
Inspect the motor connections for corrosion, damage, or loose wires.
If corroded, clean the connections or replace the wiring harness if necessary.
Test the motor operation by connecting it directly to a power source (ensure proper voltage).

5. Software Update

Connect the vehicle to a Wi-Fi network.
Check for any available software updates through the Tesla app or vehicle settings.
Follow prompts to download and install any updates that may address electrical malfunctions.