Here's a general approach. Safety first! Use jack stands and never work under a car supported only by a jack.
1. Locate the hood latch: Get under the car, positioned near the front. The hood latch mechanism will be located near the center of the front of the car, behind the grill. It might be somewhat hidden, so you may need a flashlight.
2. Identify the latch mechanism: The latch will likely consist of a lever or a series of linkages. This is what the cable normally engages.
3. Manual Release: This is the tricky part, and the exact method depends on your car's specific design. You'll need to carefully examine the latch mechanism. You might be able to:
* Find a lever or release tab: Some latch mechanisms have a small lever or tab that can be manually operated. Try gently probing around the latch with your fingers or a long, thin, blunt tool (like a screwdriver with a piece of protective tape on the tip to prevent scratching). Look for anything that might move the latch.
* Access the latch bolt: Some designs allow you to directly manipulate the bolt that holds the hood closed. You might be able to push or pry this bolt to release the hood. This is risky and could damage the latch if done incorrectly.
* Use a tool to push a linkage: The latch mechanism might have a linkage connected to the release mechanism. You might be able to carefully push this linkage to release the hood.
4. Gently lift the hood: Once you think you've released the latch, gently try to lift the hood. It might still be slightly stuck, so use caution. Have a helper gently lift the hood while you are under the car to ensure safety.
Important Considerations:
* Protective Gear: Wear gloves and eye protection to prevent injury from sharp edges and debris.
* Take Pictures: Before you start, take pictures of the latch mechanism so you have a reference if you get stuck.
* Patience: This process can be frustrating and time-consuming. Be patient and methodical in your approach.
* Professional Help: If you're uncomfortable working under the car or can't locate the latch, take it to a mechanic. Damaging the latch mechanism further can cost more in repairs.
This is a general guide; the exact method will vary depending on your specific 1989 Pontiac Bonneville model. Searching online for "1989 Pontiac Bonneville hood latch replacement" or "1989 Pontiac Bonneville hood release repair" along with images might provide more specific instructions and pictures of your model's latch. Remember to consult a repair manual for your specific vehicle year and model for more detailed instructions.
