1994 Audi Cabriolet. Central locking pump

Google search it. You are not the first person this happened to.

central locking isnot working because the boot cant lock change the boot sensor wswitch then central locking will work all good

Follow this link.
http://autolib.diakom.ru/CAR/Audi/1997/Cabriolet/SYSTEM%20WIRING%20DIAGRAMS/

If you are having trouble w/ the top. Check to make sure the central locking system is working properly. Also as on my Cabri, try locking the trunk 1st. Hope this helps

Check your fuse box....unless you hear it trying to close or open, function whatever... but im sure you have a blown fuse. especially if they stoped working at the same time.

have you had found a solution to your problem as i have exactly the same problem. all i get is the back windows going a little down when i open the catch for the hood

The humming is the central lock vacuum pump running..You either have a leak in one of the lines, or one of the hoses has popped off

LEG CameraB (1989)
Bond 43 Opere

I've been dealing with similar problems (windows and sunroof dead, power locks iffy, dome light doesn't work, random chiming) and best I can figure is:

a) get rid of the leak and any standing water
b) depending on the year of your car check the relays and/or central locking module

I spent a lot of time checking the ECU and door interior parts and those were both dead ends. I also thought the standing water on the floor might be shorting actual wiring, but now I've eliminated that as well. Although my alarm hasn't been going off, the "door chime" has and the instrument cluster sometimes shows 3 or 4 doors open while driving. VAG-COM showed some alarm trip type faults as well. Central locking is my next move when I've got some time.

I think it is very likely that it sits at the same place as in my car, which is a 92' model. Anyway, in my car it is located beneath a round cover under the carpet in the right front of the trunk.
Hope this was of any help:)

As far as the central locking issue, it sounds like you need to replace your central locking pump. You can buy them online.
I have a 95 A6 and I am in the process of looking for a new central locking pump.
The part number may be 4A0 862 257 J, that is what it is for me.
There are directions online as to how to change this yourself once you get the part. If you buy from the dealership the part is $500.
Be thankful your child locks weren't engaged. We haven't been able to open our back doors since the pump went out.