1. Lubrication: This is often the simplest solution. Try lubricating the lock mechanism with a penetrating oil like WD-40, PB Blaster, or similar. Spray liberally into the keyhole and around the latch mechanism. Let it sit for 10-15 minutes to penetrate, then try the key again. You might need to work the key gently back and forth several times.
2. Check for Obstructions: Inspect the lock mechanism for any debris, ice (if it's cold), or anything that might be jamming the mechanism. A small brush or compressed air can help clear away small obstructions.
3. Internal Release Mechanism (if equipped): Some Ford Falcons have an internal release mechanism for the tailgate. Check your owner's manual to see if yours does. This usually involves reaching inside the vehicle near the tailgate and manually releasing a latch.
4. External Latch Adjustment: There might be a slight adjustment on the external latch mechanism itself. Carefully examine the latch to see if there are any screws that might allow for minor adjustments to the latch's position. A slight adjustment might free up a binding latch.
5. Key Issues: Ensure you're using the correct key. A worn or damaged key can easily fail to engage the lock properly. Try a spare key if you have one.
6. Access Through Interior: If possible, try accessing the lock mechanism from inside the vehicle. Removing the interior trim panel around the tailgate might give you better access to work on the lock or see what's jamming it. This may require some patience and careful removal to avoid damaging the interior.
7. Emergency Release (If Applicable): Some vehicles have an emergency release cable hidden somewhere near the tailgate or inside the vehicle. Consult your owner's manual to see if such a mechanism exists on your model.
8. Professional Help: If all else fails, consider seeking professional help from a locksmith or an auto repair shop. They have specialized tools and expertise to deal with jammed locks and might be able to repair or replace the lock mechanism without causing further damage.
Important Considerations:
* Avoid Force: Never use excessive force to try and open the tailgate. This could damage the lock mechanism further.
* Safety First: Be careful when working around the lock mechanism, especially if using tools.
* Owner's Manual: Refer to your owner's manual for specific instructions and diagrams related to your vehicle's tailgate lock.
By systematically trying these steps, you should be able to resolve the jammed tailgate lock. Remember to proceed cautiously and carefully.