E30 Zone

Yesterday when I tried to unlock my car, instead of being greeted with an open door, I just got a small whinging sound. The alarm works fine, and I can open the doors manually with the key, so I didn't deem this to be an urgent problem.

Unfortunately the petrol filler cap is also on the central locking system. I realised this 30 minutes ago in tesco petrol forecourt.

Now being fairly ignorant about central locking systems, I have made a number of assumptions here. I suspect that there is an individual motor controlling each lock, and that there is a module which sends a driver voltage to each of them to faciliate the locking and unlocking.

Now as none of the doors unlock/lock, this seems unlikely to be a fault with all of the motors, so I would guess that the control module is on it's way out and is no longer able to supply the current required by all the motors.

Does this make sense? Have I made it all up?

If it does make sense then where is the module located, and who has a replacement?

Have you done the Red/Black wire mod?
The fuel filler flap can be undone by pulling the boot carpet back and moving the actuator rod by hand

if the red black wire mod does not work i have a working central locking module

Hi Dan, I've searched for the red/black wire mod but brought up nothing. What does it involve?

DHFiS wrote:http://www.e30zone.net/e30zonewiki/inde ... g_problems

Thats not the proper red black mod i followed that guide only to have the system fail on me again a few days later thankfully Mr Moore came to the rescue and got he problem sorted for me, i'll see if i can dig up my old post

Thanks for the link, i'll try that tomorrow.

This afternoon i'm just going to go for moving the actuator - i pulled the boot lining back on the right hand side, and the only interesting thing I can see is a white case, mounted maybe 300mm back from the filler cap, it has a power feed.

Am I on the right lines here?

*UPDATE*

Bit of groping around behind the actuator had me sorted!

@ Pac1982: If you could find that link buddy it would be much appreciated

Red/black wire mod may or may not help the OP!
Remove the speaker cover in the driver's foot well and have a look at the wiring harness that runs to the driver's door.
Red/black wire is always 'live',it enters the drivers door to feed a heated door lock that is rarely fitted to UK spec cars.As a result,it tends to corrode on the 'A'pillar socket pins.Proper cure is to locate the two red/black wires on the car side of the socket,cut them free and join'em together,thus enliminating the trip through the 'A' pillar socket.
I think that in the OP's case,the 'thermal' link in the central locking control module has blown.
This module hides in the driver's footwell below the speaker,held by a couple of bolts.There is a better guide to removing and fixing in the zone wiki.

This is the post i made when i was trying to fix my locking............

http://www.e30zone.net/modules.php?name ... ht=locking