Faulty central locking pump problem

[mikey P]

We have not had our mk3 golf GTI long and it has developed a strange fault when you unlock the car from a key as normal the doors unlock fine but then there is a continual noise from a small box under the driver side rear light, unfortunately the problem has got worse and has now totally flattened the battery. 
Once I have jump started the car can I just unplug this box/ does it control anything else is it likely to be simple to mend, is it a common problem?

[Len]

That is the air pump that operates the central locking.
If you cant be arsed to renew it then it wont affect anything else.

[mikey P]

Thanks for reply the problem seams to be that when the doors are unlocked the pump keeps running (and makes a lot of noise) as the pump keeps running longer than it should, what is likely to be a fault? The pump or maybe what ever sends the electrical power to the pump, a relay, or something else?
I would like to repair it if not too costly.

thanks again Mike

[Len]

Does sound like a relay dont it! Not sure if there is one but I'll check and come back to ya. Unless one of the other bright sparks around here beats me to it!

[boneybradley]

Here's your relay location's




and it say's there is a unlocking control unit behing the center console

[Overseer]

err if the pump keeps running theres a leak in the pneumatic hoses.

it'll keep the pumpo running and it'll burn itself out.. had this happen with my old Polo.. cost me 125 for a new pump

.. in my case the leak was caused by a broken petrol cap lock (the spikey thingy)

[monkeyalan]

^ what he said, it's a vacuum leak somewhere. 

good luck finding it.

[Len]

Place that gets a lot of wear would be the door gaiters. Worth a look there.