1. Identify the Faulty Sensor:
* Check the indicator light: First, make sure it's actually the sensor. If the "door ajar" light stays on even when all doors and the trunk are closed, you need to find the culprit. Try each door individually, closing and opening them to see if the light reacts. This helps pinpoint the faulty sensor.
2. Gather Tools:
* Screwdriver(s): Likely a Phillips head, but possibly a flathead depending on the sensor's mounting.
* Needle-nose pliers (optional): Might be useful for reaching connectors.
* Test light or multimeter (optional but recommended): To verify the sensor's functionality before and after replacement.
3. Access the Sensor:
This is the most variable part. The sensor is usually located:
* Inside the door: Most commonly, it's within the door itself, often near the door latch mechanism. You'll need to remove the door panel. This usually involves:
* Removing screws: Look for screws around the door panel's perimeter (often hidden under trim pieces).
* Disconnecting connectors: Carefully unplug the electrical connector(s) to the panel.
* Removing clips: The panel is often held on by plastic clips; carefully pry them loose. Be gentle to avoid breaking the clips. A plastic trim tool is helpful here.
* In the door jamb: Less common, but the sensor might be mounted on the door jamb itself. Access might require removing a small trim piece.
4. Remove the Old Sensor:
Once you've accessed the sensor, you'll need to disconnect it and remove its mounting. This typically involves:
* Unplugging the electrical connector: Carefully disconnect the wiring harness.
* Removing screws or clips: The sensor is likely held in place by screws or a clip.
5. Install the New Sensor:
* Connect the new sensor's connector: Make sure it's securely plugged in.
* Secure the new sensor: Mount it using the same screws or clips as the old one.
* Reassemble the door panel: Carefully reattach the door panel, ensuring all clips and screws are in place. Test the connection before fully reinstalling the panel.
6. Test the Repair:
* Close the door: Check if the "door ajar" light now goes off when the door is closed.
* Use a test light or multimeter (recommended): Check the sensor's wiring for proper voltage and continuity. This verifies the connection and the sensor itself is working. Consult a wiring diagram for your specific vehicle to check for voltage at the sensor.
Important Considerations:
* Wiring Diagram: Obtaining a wiring diagram for your specific 1997 Dodge Avenger is highly recommended. This will show you the location of the sensor and its wiring. You can often find these diagrams online, in repair manuals, or at auto parts stores.
* Door Panel Removal: Search YouTube for "1997 Dodge Avenger door panel removal." Videos will visually guide you through this process and prevent damage.
* Replacement Sensor: Make sure you get the correct replacement sensor. The part number should be clearly identified.
If you're not comfortable working on your car, it's best to take it to a qualified mechanic. Improperly working on your car's electrical system can cause further damage.
