You don't list a year so I will give you a general solution.
Many vehicles have a " body control module" or "illumination control module" when one of these malfunctions many systems will be affected.
Fuse 21 is the central locking & interior light fuse.
It migt be a problem with the central computer or more simply by the symptoms you describe I'll go for an alarm sytem problem
if removed and replaced properly the interior locking button should always work.
it should be in the same spot as the other fuses, but if u have a problem with your central locking you may just need to clean and lube the central locking units to get them working properly. My central locking on my 95 ef station wagon wouldn't work till i cleaned and used a bit of WD40 on the tail gate central locking unit and its been great ever since it should be in the same spot as the other fuses, but if u have a problem with your central locking you may just need to clean and lube the central locking units to get them working properly. My central locking on my 95 ef station wagon wouldn't work till i cleaned and used a bit of WD40 on the tail gate central locking unit and its been great ever since
That would be the DOOR LOCK (30A) Fuse in the Interior Fuse Panel.
Had the same problem on my 2000yr TD. The black wire was broke which runs between the door and A post which seems to be a common problem as its always flexing with the door opening and shutting, but I was suprised how many functions this affected!
above the rear view mirror near the interior light and sunroof handle, mk1 saxo vtr
Central locking on madza 2 not working
All Ford vehicles have a central locking system that were manufactured after 1993. The Ford focus has always had the central locking system.
yes it does , but its manual central locking. I can find the central lock button inside the car
A central locking kit converts your car to fully remote central locking which enables you to lock the entire car from the driver's door in an instant.
how do you reset remote central locking peugeot partner