central locking pops straight back up

[Tam Lin]

I've had a couple of occasions where the central locking unlocks immediately after I've locked it. First time it happened using a remote, so I thought I held the button on the plipper down too long, but now it's done it when locking with a key.

Any ideas which bit to replace & is it expensive?

 

[Black_JPN]

Sounds like it still thinks the door is open. With the door open mine has this behaviour when I try to lock it. What are the interior lights doing?

 

[Tam Lin]

Hi, thanks

The interior lights are permamnently off on my car, but I can switch them over to check for this..in which case I presume the fix would be to clean/replace the door opeining sensor in the front wing door-shut, correct?

 

[Black_JPN]

ORIGINAL: Tam Lin

Hi, thanks

The interior lights are permamnently off on my car, but I can switch them over to check for this..in which case I presume the fix would be to clean/replace the door opeining sensor in the front wing door-shut, correct?

Yep, it would rule it out.

 

[zcacogp]

Erm, don't think it is to do with the button in the door shut - that just controls the lights.

The central locking servo in each door has both the ability to lock and unlock the door, and also a sensor to tell the control mechanism what position the door pin is in. When the car was made (before remote control plippers), you would put the key in the drivers door and unlock it. Moving the pin up with the key would signal to the control unit that the door was opened and it would then open the passenger side. It would also move the pin up on the drivers' door, so if you didn't move the key that quickly then you would feel it kick slightly.

What I suspect you have is a wiring problem (probably a wire gone to ground - poor insulation) or a fault in the servo in the drivers door. Get a wiring diagram (www.cannell.co.uk) and work out what colour the wires are and what they do, and take the door apart and test 'em with a multimeter. The fault will be pretty easy to find, I'd have thought, and cheap to fix. (Servo motors can be bought in Maplin for about £7.)


Oli.

 

[Tam Lin]

Thanks Oli
I swear I'll put a zip around the outside of that stoopid door inner: This will be the fourth time this year that I've taken that door apart. First the window separated from the runner, then the wiring to the window switches became wonky, then something was rattling after my "fix"..

 

[zcacogp]

Ahhh ... as my late grandfather used to say, "When the wheel nuts do more RPM than the engine, you know the car has an enthusiastic owner ... "


Oli.

 

[elvis]

Are you sure both door lock barrels have returned to their 'normal' position (key slot horizontal)? Mine are a bit lazy if I use the key to unlock the car and the central locking acts exactly as you've described if you leave one skew.

Or of course, it could be the microswitch in the door lock that tells the system where the lock barrel is. Door trim off, window out, window runner out etc []

Tim

 

[peanut]

or if you are a lazy B like me you could just leave it and with any luck a few months down the line it will suddenly start working again all of its own accord ! []

Noticed a few weeks back that when operating the drivers door the pass door lock would operate at the same time . Previously I had to go round the pass side and lock that every time I got out of the car Grrrr[]