1. Check the Obvious:
* Is the battery fully charged? A weak battery can affect power-operated features.
* Is the trunk switch working correctly? Try manually closing the trunk. If it doesn't close manually, the problem might be with the trunk latch mechanism itself.
* Are there any obstructions? Is anything preventing the trunk from closing completely? A loose object, a misplaced item, or even a slight misalignment can prevent the automatic closure.
* Is the key fob battery dead or low? If the remote trunk release is malfunctioning, the battery in the key fob could be the culprit. Try a new battery.
2. Check Fuses:
* Consult your owner's manual to locate the fuse(s) related to the power trunk release. Check for blown fuses and replace them if necessary.
3. Inspect Wiring and Connections:
* Trunk switch wiring: Inspect the wiring harness connected to the trunk release switch for any damage, loose connections, or corrosion.
* Trunk latch mechanism wiring: Check the wiring going to the trunk latch mechanism. Look for broken wires, loose connections, or corrosion. This is often located near the trunk hinge area.
* Body Control Module (BCM): The BCM controls many electrical systems, including the power trunk release. A faulty BCM can cause this issue, but diagnosing this requires professional tools and expertise.
4. Check the Trunk Latch Mechanism:
* Physical condition: Inspect the latch mechanism for any damage or wear. A broken or malfunctioning latch is a common cause of failure.
* Actuator motor: The trunk latch mechanism contains a small electric motor (actuator) that does the actual closing. This motor could be failing.
5. Diagnostic Tools:
* A professional mechanic can use a scan tool to read diagnostic trouble codes (DTCs) from the vehicle's computer system. This may identify the source of the problem more precisely.
6. Consider Professional Help:
If you've checked all of the above and still can't resolve the issue, it's best to take your Cadillac Seville to a qualified mechanic or Cadillac specialist. Troubleshooting electrical issues can be complex, and attempting repairs without the proper knowledge could cause further damage.
Remember to always disconnect the battery's negative terminal before working on any electrical components in your vehicle. Safety first!
