* Faulty Central Locking Actuator(s): This is the most likely cause. The actuators are the motors that actually move the locking mechanisms. One or more could be malfunctioning, causing intermittent activation. They can short circuit, become worn, or have issues with their internal gears.
* Wiring Issues: A short circuit, frayed wire, or corroded connection in the wiring harness leading to the actuators or the central locking system's control module is a strong possibility. Movement of the wires during driving could be causing intermittent contact.
* Central Locking Module Failure: The module controls the entire central locking system. A failing module can send erratic signals to the actuators.
* Bad Door Switch(es): While less likely to cause *constant* cycling, a faulty door switch could be sending intermittent signals to the locking system, especially if it's getting bumped around while driving.
* Body Control Module (BCM) Problems: The BCM is a more complex computer that manages many vehicle functions, including sometimes the central locking system. A faulty BCM could cause problems throughout the system.
What to do:
1. Safety First: This is a significant safety concern. If the locks are cycling frequently enough to be distracting or dangerous, drive the car as little as possible until the problem is resolved.
2. Check Fuses: Start with the simplest check – verify all fuses related to the power locks are intact in the fuse box.
3. Visual Inspection: Carefully inspect the wiring harnesses leading to the door locks and the central locking system. Look for any obvious signs of damage like frayed wires, corrosion, or loose connections.
4. Professional Diagnosis: The most likely scenario is that you'll need a mechanic or auto electrician familiar with older Chryslers to diagnose the problem. They have the tools and experience to pinpoint the faulty component (actuator, module, wiring, etc.) and perform the necessary repairs. Mentioning the specific, persistent cycling of the locks will help them narrow their focus.
5. Consider the Age of the Vehicle: Given the age of your LeBaron, replacing worn components might be a more cost-effective solution than extensive electrical troubleshooting.
Do not attempt extensive electrical repairs yourself unless you have significant experience with automotive electrical systems. Incorrect wiring can cause further damage or even create a fire hazard. Prioritize getting this fixed to ensure your safety and the safety of others.
