GMC Sierra T1XX (2019-Present) windshield wipers not working properly what's going on

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

476 words

Problem Statement

Learn how to diagnose and fix windshield wipers not working on GMC Sierra T1XX. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool down before handling any components near the engine compartment.

Symptoms

•Windshield wipers do not activate when switched on
•Wipers operate intermittently or erratically
•Wiper blades do not park in the correct position
•No sound from wiper motor when activated
•Wiper fluid does not spray when activated

Diagnostic Steps

1
Inspect the wiper switch for any visible damage or wear.
2
Check fuses related to the windshield wiper system using the vehicle's fuse box diagram.
3
Test the wiper motor by applying direct power to determine if it operates.
4
Verify the wiper linkage for any disconnections or damage.
5
Use an OBD-II scanner to check for related error codes that may indicate electrical faults.
6
Inspect the wiring harness for frayed or damaged wires.

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

•Socket set
•Multimeter
•OBD-II scanner
•Wiring diagram

Parts Required

•Wiper motor (if faulty)
•Wiper switch (if faulty)
•Wiper linkage (if damaged)
•Wiper blades (if worn)

Related Faults

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Diagnostic Steps

1
Inspect the wiper switch for any visible damage or wear.
2
Check fuses related to the windshield wiper system using the vehicle's fuse box diagram.
3
Test the wiper motor by applying direct power to determine if it operates.
4
Verify the wiper linkage for any disconnections or damage.
5
Use an OBD-II scanner to check for related error codes that may indicate electrical faults.
6
Inspect the wiring harness for frayed or damaged wires.

Solution

1. Preparation

Gather tools: Socket set, multimeter, OBD-II scanner, and wiring diagram.
Disconnect the vehicle battery to prevent electrical shorts.

2. Inspect and Replace Wiper Switch

Remove the steering column cover using a socket set.
Disconnect the wiper switch connector.
Use a multimeter to test the switch for continuity.
If faulty, replace with a new switch and reconnect.

3. Check and Replace Wiper Motor

Locate the wiper motor under the cowl panel.
Disconnect the motor’s electrical connector.
Remove the wiper motor by unscrewing the mounting bolts.
Install a new wiper motor, ensuring it is securely mounted, and reconnect the wiring.

4. Inspect Wiper Linkage

Remove the wiper arms by unscrewing the retaining nuts.
Detach the cowl cover to access the wiper linkage.
Inspect the linkage for bends or breaks and replace if necessary.
Reassemble linkage and reattach wiper arms.

5. Test Wiper Fluid Spray

Inspect the wiper fluid reservoir and pump.
Check the hose for clogs or leaks and replace if needed.
Test the pump operation by applying direct power and ensure fluid sprays when activated.