Here's a systematic approach to troubleshoot and fix the issue:
1. Identify the Culprit Door:
* Test Each Door: Carefully close each door one at a time, listening for a definite *click* from the door switch. If the light goes out when you close a specific door, that's your likely suspect. Pay close attention to the driver's side door; they often have more wear and tear.
2. Inspect the Door Switch(es):
* Locate the Switch: Each door has a door ajar switch. These are usually located within the door jamb itself. You'll likely need to remove the door panel to access them. Consult a repair manual (Haynes or Chilton) or online resources specific to your 1995 Dodge Intrepid for instructions on removing the door panel. Be careful not to damage any electrical connectors.
* Visual Inspection: Once the panel is removed, look at the switch itself. Check for:
* Broken Wiring: Look for any frayed, broken, or disconnected wires.
* Loose Connections: Ensure the switch is securely connected to its wiring harness.
* Physical Damage: Check the switch for any signs of cracking or damage.
* Testing the Switch (If Possible): If you have a multimeter, you can test the switch's continuity. With the door closed, it should show open (infinite resistance). With the door open, it should show closed (near zero resistance). However, this is usually a more advanced step and requires some understanding of electrical testing.
3. Check the Wiring Harness:
* Trace the Wiring: Follow the wiring harness from the door switch(es) back towards the interior light control module or body control module (BCM). Look for any damage, breaks, or corrosion along the entire path. Again, a repair manual will be invaluable here.
* Connections: Examine all connectors along the wiring harness for corrosion or loose connections.
4. Consider the Body Control Module (BCM):
* Faulty BCM: While less likely, a faulty BCM could also be causing the problem. The BCM controls many electrical functions within the car. This is the most difficult component to diagnose and would likely require professional diagnosis or replacement.
5. Ground Issues:
* Poor Ground: A poor ground connection can sometimes cause erratic behavior in electrical systems. Check the ground connections in the affected door area and ensure they are clean and tight.
Important Notes:
* Repair Manual: A repair manual is highly recommended. It will provide detailed diagrams and instructions for removing door panels and accessing the switches and wiring.
* Safety First: Disconnect the negative battery cable before working on any electrical components.
* Professional Help: If you're uncomfortable working on car electrical systems, it's best to seek professional help from a qualified mechanic.
By systematically checking each of these areas, you should be able to identify the cause of the persistent "door ajar" light and resolve the issue. Remember to always prioritize safety and consult a repair manual when working on your vehicle's electrical system.
