Factory Central locking problem

[paulblah]

Hi All

Got an issue with my central locking.

When I unlock the door with the key only that single door opens so I guess its something major in the locking system.

The key fob central locking works intermittently so not the fuse, also get a buzzing noise when pressing the key fob button

Can anyone point me in the right direction?

Cheers

_________________

 

[rob rule]

Sound like the key fob is the culprit here...
try the spare key?
You can get replacement keys but they need to be coded to your ignition first.

 

[paulblah]

Its not the key fob. The key and the remote button are seperate. Ive tried the spare key fob and Ive changed the battery.

 

[rob rule]

am I correct that the Key (only) can unlock only one door - whereas the fob (remote) does not unlock all/any/one door?

 

[paulblah]

Thats correct. Intermittently the fob will work and open all the doors.

 

[rob rule]

ok - then the fob is/has given notice...I am sure you have replaced the battery with limited joy?
better to replace the fob as sometimes the little button/switch thingys have had it.
you do get aftermarket replacements (again just need to match codes or dip switch settings)

 

[paulblah]

Ive already tried the spare key fob and new batteries in both

 

[rob rule]

I think that kinda covers the basics....
next is to find unlock servos and see what their issue is (loose connection?) earth/neutral?