1. The Door Lock Actuator: This is the most likely culprit. The actuator is a small motor inside the door that moves the lock mechanism. It might be:
* Broken: The motor itself might be burned out or the gears stripped. This is the most common failure point.
* Jammed: Debris or wear might prevent it from moving freely.
* Wiring Issues: While less likely to cause just an inside-only operation, a partial short or break in the wiring to the actuator can cause erratic behavior.
2. The Door Lock Linkage: This is the mechanical connection between the actuator and the lock mechanism itself. It can become:
* Dislodged: Simply popped off or disconnected.
* Broken or Bent: The rod or other linkage parts can break or bend, preventing the exterior handle from working.
3. The Door Lock Switch (Inside Handle): Less likely to be the sole cause of *only* the inside handle working, but a faulty switch could contribute if it's affecting the actuator's power. This usually results in *no* outside operation.
Troubleshooting Steps:
1. Check the obvious: Make sure the door is properly closed and latched. Sometimes, a slightly ajar door can interfere with the mechanism.
2. Listen for sounds: When you try the exterior handle, do you hear any clicking or grinding sounds from inside the door? This can pinpoint the actuator as the problem.
3. Inspect the linkage: Carefully remove the inside door panel (there are online tutorials specific to the 1995 Saturn SL2 that show this process; search for "1995 Saturn SL2 door panel removal"). Once the panel is off, visually inspect the linkage connecting the exterior handle mechanism to the actuator. Check for broken or disconnected parts. Try moving the linkage manually to see if the lock moves.
4. Test the actuator: With the panel off, you can usually access the actuator. You can try directly powering it with a 12V source (use caution!) to see if it moves. Be extremely careful when working with car electrical systems. Incorrect wiring can damage the actuator or other components. Use a multimeter to check the wiring for continuity and voltage if comfortable doing so.
5. Check the wiring: With the door panel removed, visually inspect the wires leading to the actuator for any damage, breaks, or corrosion.
Repair Options:
* Replace the actuator: This is the most common and usually most effective repair. You can purchase replacement actuators relatively inexpensively online from parts suppliers (be sure to specify the year, make, and model of your Saturn).
* Repair the linkage: If the linkage is broken or dislodged, you may be able to repair it with simple tools or replace it with a new part.
* Replace the inside handle switch: Less likely needed in this scenario, but it's possible.
Important Considerations:
* Safety First: Disconnect the battery's negative terminal before working on the electrical system.
* Online Resources: Search for "1995 Saturn SL2 door lock repair" on YouTube or other repair sites. Many videos demonstrate the process of removing the door panel and replacing the actuator.
* Professional Help: If you're uncomfortable working on car mechanics or electrical systems, it's best to take your Saturn to a qualified mechanic.
By following these steps, you should be able to diagnose and repair the faulty passenger-side power door lock on your 1995 Saturn SL2. Remember to always prioritize safety and take your time.
