Jaguar XJ8 passenger door unlocked light stays on after rain, causing battery drain on Jaguar XJ8

Some Jaguar XJ8 owners report experiencing issues with the passenger door unlocked light staying on after rain, which can lead to battery drain. This problem may be related to a faulty lock mechanism, as some owners have had to replace the passenger motor due to the lock not functioning properly. Additionally, persistent issues following rain could indicate water ingress that affects the electrical components in the door, potentially triggering the warning light. In some instances, a faulty door switch or microswitch in the door latch may cause the light to remain on intermittently. Owners are advised to ensure the door is properly closed and check for any seal issues that might allow water to enter. If simple remedies, like lubricating the door mechanisms, do not resolve the issue, it is recommended to have a mechanic inspect the door switches and electrical components for defects or shorts in the system.