How can you open the trunk on a 1997 Jaguar XJ6 when the electrics on the car are fine and the key will not open it?

If the key won't open the trunk of a 1997 Jaguar XJ6 but the electrics are functioning, you can try using the valet switch inside the glove compartment to release the trunk latch. Alternatively, you can access the trunk through the rear seats by folding them down, which may allow you to reach the trunk release mechanism directly. If these methods don't work, consider consulting a professional locksmith or a Jaguar specialist for assistance.