how to fix Ram 1500 DT (2019-Present) cruise control not working

Ram 1500 DT (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

522 words

Problem Statement

Learn how to diagnose and fix cruise control issues in Ram 1500 DT (2019-present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or short circuits.
•Allow the vehicle to cool down before inspecting components to avoid burns.

Symptoms

•Cruise control light on the dashboard not illuminated
•Inability to set or resume cruise control speed
•Cruise control disengages unexpectedly
•No response from cruise control buttons on the steering wheel
•Increased driver fatigue due to constant speed adjustments

Diagnostic Steps

1
Check for any active error codes using an OBD-II scanner.
2
Inspect the cruise control fuse in the fuse box for continuity.
3
Visually inspect the cruise control switch on the steering wheel for damage or debris.
4
Test the brake pedal switch to ensure it operates correctly and is not stuck.
5
Verify the vehicle's speed sensor is functioning properly.
6
Examine wiring and connections in the cruise control system for any damage or corrosion.

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
•Socket set
•Screwdriver set

Parts Required

•Cruise control fuse (if blown)
•Brake pedal switch (if faulty)
•Cruise control switch assembly (if defective)

Related Faults

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Diagnostic Steps

1
Check for any active error codes using an OBD-II scanner.
2
Inspect the cruise control fuse in the fuse box for continuity.
3
Visually inspect the cruise control switch on the steering wheel for damage or debris.
4
Test the brake pedal switch to ensure it operates correctly and is not stuck.
5
Verify the vehicle's speed sensor is functioning properly.
6
Examine wiring and connections in the cruise control system for any damage or corrosion.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Fuse

Locate the fuse box and find the cruise control fuse.
Use a multimeter to check for continuity in the fuse.
If the fuse is blown, replace it with a fuse of the same amperage.

3. Check and Replace Brake Pedal Switch

Locate the brake pedal switch, typically mounted near the top of the brake pedal.
Disconnect the electrical connector from the switch.
Test the switch with a multimeter; it should show continuity when the brake pedal is pressed.
If defective, remove the switch by unscrewing or unclipping it from its mount.
Install a new switch and reconnect the electrical connector.

4. Inspect Cruise Control Switch

Remove the steering wheel cover to access the cruise control switch.
Check for any physical damage or loose connections.
If damaged, replace the cruise control switch assembly.

5. Reconnect Battery and Test

Reconnect the battery after all repairs are complete.
Test the cruise control system by setting it while driving at highway speeds.