When trying to have one front seat going "Fore/aft" (using the Jaguar terms) the corresponding fuse blown.

This was due to the motor (under seat) that was blocked (probably because it was not used for a long time)
The motor itself is central and it makes turn two (right and left) long threads thanks to 2 flexible? axes going out the motor and in the threads.

I just gently moved the flexible axes to make sure they were able to rotate and everything was solved.

Conclusion (obvious for electricians): an electric motor which is blocked creates a high electrical resistance which thus makes the protection fuse to fuse.
Hope it helps
Cheers