Tools You'll Likely Need:
* Phillips head screwdriver (possibly a flathead as well, depending on the screws)
* A small panel tool or trim tool (to avoid scratching the plastic)
* New taillight assembly (get the correct one for your side – left or right)
* Possibly a socket wrench (depending on the bulb holder)
Steps:
1. Preparation: Park your car on a level surface, engage the parking brake, and turn off the car.
2. Trunk Access: Open the trunk.
3. Inner Trunk Panel Removal: You'll need to remove the inner trunk panel that's located near the taillight. This usually involves removing some screws and carefully prying the panel away from the body. Be gentle; these panels are often fragile. Use your panel tool to avoid damage.
4. Accessing the Taillight: Once the inner trunk panel is removed, you should have access to the back of the taillight assembly. There will likely be several screws or fasteners holding the taillight in place.
5. Removing the Taillight: Carefully remove the screws or fasteners holding the taillight assembly to the body of the car. Gently pull the taillight assembly away from the car. There might be some connectors attached – be careful not to break them.
6. Disconnecting Electrical Connectors: Disconnect the electrical connectors from the back of the taillight assembly. These are usually push-in connectors; gently press the release tab (if there is one) and pull the connector apart.
7. Bulb Replacement (If only the bulb is out): If only the bulb is burned out, carefully remove the bulb from its socket. *Note:* Some bulbs may twist out, others may have a retaining clip. Replace with a bulb of the same type and wattage. (You'll want to find this information either in your owner's manual or on the old bulb itself)
8. Installing the New Taillight (If replacing the assembly): If you're replacing the whole assembly, carefully align the new taillight and reattach the electrical connectors. Then, secure the taillight assembly to the car body using the screws or fasteners you removed earlier.
9. Reassembly: Carefully put the inner trunk panel back in place and reattach the screws.
10. Testing: Turn on your taillights and check to ensure the new light is working correctly.
Important Considerations:
* Wiring: Be extremely careful with the wiring harness. Avoid pulling or tugging on the wires themselves.
* Photography: Before you start disassembling anything, take pictures! This will help you remember how everything goes back together.
* Bulb Type: Make sure you replace the bulbs with the correct type and wattage. Incorrect bulbs can cause damage to the electrical system or lead to premature failure.
* Professional Help: If you're uncomfortable with any part of this process, it's always best to take your car to a qualified mechanic.
This guide provides general instructions. Variations in design may exist, so the precise steps might differ slightly. Refer to a repair manual specific to your 1996 Cadillac DeVille Concours for detailed, model-specific instructions. A Haynes or Chilton manual would be a great investment if you plan on doing more car repairs yourself.
