my Ram 1500 DT (2019-Present) door ajar light stays on, what can I check?

Ram 1500 DT (2019-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

405 words

Problem Statement

Learn how to diagnose and fix the door ajar light issue on your Ram 1500 DT. 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 avoid shocks or shorts.

Symptoms

•Door ajar warning light stays on
•Possible chime or alert sound when vehicle is running
•Inconsistent interior light operation (lights may not turn off)
•Difficulty locking doors (if the system thinks a door is open)
•Increased battery drain if left unattended

Diagnostic Steps

1
Inspect all door switches for proper operation and physical damage.
2
Check for any loose or corroded wiring connections at each door's harness.
3
Use an OBD-II scanner to check for any related error codes.
4
Manually open and close each door to see if the light responds correctly.
5
Verify that the doors are properly aligned and latching correctly.

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
•Flathead screwdriver

Parts Required

•Door switch (if faulty)
•Electrical connectors (if corroded)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect all door switches for proper operation and physical damage.
2
Check for any loose or corroded wiring connections at each door's harness.
3
Use an OBD-II scanner to check for any related error codes.
4
Manually open and close each door to see if the light responds correctly.
5
Verify that the doors are properly aligned and latching correctly.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, and a flathead screwdriver.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Door Switches

Sub-steps:
1. Locate the door switch on each door (usually mounted in the door frame).
2. Remove the switch using a flathead screwdriver if necessary.
3. Test the switch with a multimeter for continuity (should show closed when pressed).
4. Replace any faulty switches.

3. Check Wiring Connections

Sub-steps:
1. Examine the wiring harness leading to each door switch for damage or corrosion.
2. Clean any corrosion with electrical contact cleaner and a brush.
3. Secure any loose connections and ensure all pins are seated correctly.

4. Reset the System

Sub-steps:
1. Reconnect the battery terminal.
2. Turn on the ignition but do not start the engine.
3. Allow the vehicle to sit for a few minutes to reset the electronic systems.