Rear Door Lock Whirring?

[punkieys17]

New member being greedy here with a second question. When I replaced the battery on my 2003 C5 HPI after a year off the road the left rear door started making a whirring sound - like a motor turning. I finally took out the fuse for the door lock and it stopped. Can anyone tell me whats going on and help me with what I need to do to make it stop please, Julian

[Porsche430]

Possible faulty door lock.

[paul.h]

Welcome to the forum.

 

Back doors are known for the locks failing and preventing them from being opened so possibly something to fix sooner rather than later. You will need to remove the door card to get at it which is easier if the door can still be opened. However, you could try a battery disconnection/reconnection in case it was done a bit quick and did not allow the bsi to shut down properly. This procedure works well for me, copied from the C5 Technical section Common problems pinned topic:

14. Rear door will not open from the inside and outside.

This has not happened to our C5s but it is a common problem. To fix:

 

remove the door card, it is awkward with the door shut but can be done

once removed, follow the rod to the door lock and remove the white plastic cover

now try to look into the door and you will see the insides of the lock

use a screwdriver and push the lever down on the inside of the lock and the door will open

replace the lock with a different one.

 

16. Odd electrical problems caused by wrong battery disconnection procedure.

If you need to disconnect the battery and not do a BSI reset procedure, I have found the following has not given me any problems on a 2004 and 2007 C5 and a 2003 C3:

- remove the ignition key from the car

- open the bonnet

- wait a few minutes for the BSI to shut down

- disconnect the battery negative terminal

 

When reconnecting

- ignition key out of the car

- reconnect the battery

- wait a few minutes

- insert the key in the ignition and wait a minute

- turn the key to the first position and wait a minute

- turn the key so the dash lights come on and wait a minute

- start the engine

- take the windows down and up to reset the anti pinch

- reset the clock (and radio on the C3).