how to troubleshoot the rearview mirror display not working on my Ram 1500 DT (2019-Present)?

Ram 1500 DT (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

573 words

Problem Statement

Learn how to troubleshoot and fix the rearview mirror display issue on your Ram 1500 DT. Step-by-step guide with diagnostic steps 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 systems to avoid shocks or shorts.
•Ensure the vehicle is in park and the engine is off while performing repairs.

Symptoms

•Rearview mirror display is blank or not lighting up
•Rearview camera image not appearing
•No error messages or warnings on the dashboard
•Buttons on the mirror not responding
•Physical damage or malfunction of the mirror housing

Diagnostic Steps

1
Inspect the wiring harness connected to the rearview mirror for any damage or loose connections.
2
Check the vehicle’s fuse box for any blown fuses related to the rearview camera and display system.
3
Use an OBD-II scanner to check for any stored trouble codes that may indicate a malfunction in the camera or display system.
4
Test the rearview camera functionality by activating it through the infotainment system to see if it works independently of the mirror display.
5
Verify power supply to the mirror by using a multimeter to check voltage at the mirror’s connector.

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

•Trim removal tool
•OBD-II scanner
•Multimeter
•Screwdriver set
•Fuse puller

Parts Required

•Replacement rearview mirror (if deemed necessary)
•Fuses (if blown)

Related Faults

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Diagnostic Steps

1
Inspect the wiring harness connected to the rearview mirror for any damage or loose connections.
2
Check the vehicle’s fuse box for any blown fuses related to the rearview camera and display system.
3
Use an OBD-II scanner to check for any stored trouble codes that may indicate a malfunction in the camera or display system.
4
Test the rearview camera functionality by activating it through the infotainment system to see if it works independently of the mirror display.
5
Verify power supply to the mirror by using a multimeter to check voltage at the mirror’s connector.

Solution

1. Preparation

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

2. Inspect Wiring

Remove the plastic cover around the rearview mirror gently using a trim removal tool.
Check all wiring connections for wear or damage.
Reconnect any loose connectors and ensure they are securely fastened.

3. Check and Replace Fuse

Locate the vehicle’s fuse box, typically found under the dashboard or in the engine compartment.
Identify the fuse associated with the rearview mirror/display (refer to the owner's manual for the exact location).
Remove the fuse using a fuse puller and inspect it for continuity.
Replace with a new fuse of the same amperage if blown.

4. Test Rearview Camera

Reconnect the battery and turn on the ignition.
Activate the rearview camera through the vehicle's infotainment system to confirm its functionality.
If the camera works but the mirror display is still non-functional, it indicates an issue with the mirror itself.

5. Replace Rearview Mirror (if necessary)

Disconnect the electrical connector from the rearview mirror.
Remove the mounting bracket or screws holding the mirror in place.
Install the new rearview mirror by reversing the removal process.
Reconnect the electrical connector and ensure the mirror is securely mounted.