how to fix the windshield wipers not working on my GMC Sierra T1XX (2019-Present)

GMC Sierra T1XX (2019-Present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

Learn how to diagnose and fix windshield wipers not working on GMC Sierra T1XX. 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 components to avoid shock or short circuits.
•Allow the engine and components to cool before working on them to prevent burns.

Symptoms

•Windshield wipers do not activate when the control lever is engaged
•No sound or movement from the wiper motor
•Wiper fluid does not spray when activated
•Intermittent wiper function may work sporadically
•Dashboard warning light illuminated related to the wiper system

Diagnostic Steps

1
Check the fuse for the windshield wiper circuit using the fuse box diagram.
2
Inspect the wiper control switch for proper operation and connectivity.
3
Test the wiper motor by applying direct power to it from a 12V source.
4
Verify that the wiper linkage is intact and not damaged or disconnected.
5
Scan the vehicle's computer for any related error codes using an OBD-II scanner.

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
•Screwdriver set
•Socket set
•Pliers

Parts Required

•Wiper control switch (if faulty)
•Wiper motor (if faulty)
•Fuses (as needed)

Related Faults

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Diagnostic Steps

1
Check the fuse for the windshield wiper circuit using the fuse box diagram.
2
Inspect the wiper control switch for proper operation and connectivity.
3
Test the wiper motor by applying direct power to it from a 12V source.
4
Verify that the wiper linkage is intact and not damaged or disconnected.
5
Scan the vehicle's computer for any related error codes using an OBD-II scanner.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is off.
Gather necessary tools and replacement parts.

2. Check and Replace the Fuse

Locate the fuse box under the dashboard or in the engine compartment.
Remove the fuse for the windshield wiper (refer to the owner's manual for specific location).
Inspect the fuse for continuity; replace it if blown.
Reinstall the new fuse and test the wipers.

3. Inspect and Replace the Wiper Control Switch

Remove the steering column cover using a screwdriver.
Disconnect the battery to prevent electrical shorts.
Unplug the wiper control switch from its connector.
Using a multimeter, test the switch for continuity.
If faulty, replace the switch with a new one, ensuring proper alignment and connection.

4. Test and Replace the Wiper Motor

Access the wiper motor, which is typically located under the plastic cowl cover.
Disconnect the wiper motor connector.
Using a multimeter, check the voltage at the motor connector while the wiper switch is activated.
If there is no voltage, further diagnose the wiring harness for damage.
If voltage is present but the motor does not function, replace the wiper motor.

5. Reassemble and Test

Reinstall any components removed during the process, ensuring everything is secured properly.
Reconnect the battery.
Test the wipers to confirm they operate correctly.