Cavlier Central Locking

Mar 30, 2005 13 Replies

Hi,



I've got a problem with the central locking on my Mk3 cavalier (one with deadlocks). When you lock the driver's door or push the lock down, all the other locks go down and then pop back up. The same thing happens if you try locking the boot.



I've taken the fuse out for the time being, but this seems to have disabled the alarm as well (I can't see it flashing anyway).



Anyone know where to start looking for the fault???



Thanks,



Iain



PS It did this a while ago, but the problem went away the same day.


Almost always the wires going through the door hinges....

Andy

Bugger. Was hoping it'd be something else...

Thanks,

Iain

Quite so, I used to post on the cavweb forums years ago in my early twenties, I found an easy way to change the bulbs in the fascia without removing the whole dashboard.

The other likely suspect is the drivers door.

Andy

PS I found this

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Seems to suggest that the boot hinge wires are a likely suspect. Gotta start somewhere I suppose. Sod's law says it'll be door you try last....

Iain

I had the same problem with mine, The wires attached to the boot hinge were damaged.

John

How did you do that then?!?!? (One of the speedo bulbs is blown on mine!)

Cheers,

Iain

It's a bit faffy, but the instrument panel can be manoeuvred out by removing its surround and the top cover for the steering column. Undo the screws then pull it out far enough to unclip the speedo cable. Doesn't help if you have big hands though, so get the wife to do it. :o)

Can you unlock everything from the boot? 'Cause I'd say it has to be a short on the switching circuit - or in the controller. A short or break on a motor circuit would just stop that motor working or blow a fuse.

Hi,

If I lock the car using the boot lock, all the buttons inside go down, then pop back up again.

It's a hatchback, if that makes any difference...

Cheers,

Iain

Right. I suppose it could be a wiring fault, but my money would be on the controller. Basically all this does is convert the signal from the switch

- which is there for as long as you hold the key in that position - to a timed pulse long enough for the motors to go their full travel. Of course a faulty switch could have the same effect, but two with the same fault? Is it OK from the passenger's side?

Urrrm... I can't remember if I tried locking it from the passenger's side. The locks that are on it are the dead-lock type (either cos it's a GLS or a V6). You put the key in the lock vertically and turn it 90deg anti-clockwise and remove. You can turn it back to vertical if you don't want the alarm set, but it's normal to leave it.

You can't dead-lock it from the passenger's side - and you can't unlock it from their either if it's been dead-locked on the driver's side.

Where abouts is the controller located? Driver's footwell perchance?

Cheers,

Iain

I'd say that's mainly a mechanical function - unless you can unlock it from the boot when deadlocked?

No idea, I'm afraid.

Well, guess what? Put the fuse back in tonight (it was out for 24h) and it's working again...

One of the wonders of the modern world, eh? ;-)

Thanks again,

Iain

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