1. Identify the Problem:
* Latch won't engage: The latch mechanism might be broken, the cable might be frayed or disconnected, or the striker plate (on the body) might be misaligned or damaged.
* Latch won't release: The internal release mechanism (often a cable or linkage) might be broken, jammed, or frozen. The actuator (the button or lever you use to open the hatch) might be faulty.
* Hatch doesn't close securely: The latch might not be engaging properly, the striker plate might be bent, or the hatch itself might be misaligned.
* Intermittent problems: This suggests a loose connection, corrosion, or a failing component.
2. Troubleshooting Steps:
* Visual Inspection: Carefully inspect the entire latch mechanism, both inside the hatch and on the vehicle body. Look for broken or bent parts, frayed cables, corrosion, and misalignment. Pay close attention to the cables and linkages connecting the interior release handle to the latch.
* Check the Cables: If you suspect a cable problem, trace the cable from the interior release handle to the latch mechanism. Look for fraying, breakage, or disconnections. You may need to remove interior trim panels to access the cable fully.
* Test the Actuator: Try the interior release handle and the key (if applicable) to see if the actuator is working. If it doesn't move, the actuator itself may be the problem.
* Check the Striker Plate: Make sure the striker plate on the vehicle body is properly aligned with the latch mechanism. If it's bent or damaged, it needs to be repaired or replaced.
* Lubrication: If the latch mechanism is stiff or sluggish, try applying a penetrating lubricant (like WD-40 or similar) to the moving parts. Let it sit for a few minutes and then work the latch a few times. *Important: Avoid excessive lubrication as it can attract dirt and grime.*
3. Repair or Replacement:
* Minor Repairs: If you find a broken cable, you might be able to splice it or replace the damaged section. If a part is bent or broken, it may be repairable with some careful manipulation or replacement of small parts. This often requires advanced mechanical skills and knowledge.
* Replacement Parts: If the damage is too extensive, you'll likely need to replace parts of the latch assembly. Finding replacement parts for a 1991 Voyager may require searching online auto parts stores (like RockAuto, eBay, or Amazon) or visiting a salvage yard. You'll need to identify the correct part number based on your vehicle's specific information.
* Professional Help: If you're not comfortable working on the latch mechanism yourself, take your Voyager to a qualified mechanic or auto body shop. This is especially true if you are not comfortable with working on car components.
Important Notes:
* Safety First: Always disconnect the battery's negative terminal before working on any electrical components.
* Take Pictures: Before disassembling anything, take pictures to help you remember how things go back together.
* Patience: Repairing a latch mechanism can be time-consuming and require patience.
This is general guidance; the specific repair will depend heavily on the exact nature of the malfunction. A detailed repair manual for your 1991 Plymouth Voyager would be extremely helpful. You can often find these manuals online (PDF versions) or at auto parts stores. Remember to always prioritize safety and consult a professional if you're unsure about any step.
