463 Central Locking
Just a minor but irratating fault. On my GDS I can only lock all three doors from the back door.If i then open it from the front doors it wont open the back door, so in effect the back lock is independent.I have replaced the electric motor in the back , but the fault is still there.I presume wiring is to blame, no obvious striped insulation.
Jason,
I am guessing here but perhaps it has to do with how the rear lock is set with the key ?
We had a car once with some such arrangment, it was frustrating to say the least
As I said I am guessing.
Cheers,
Marcus
Could very well be as Marcus says. On the (older) merc saloons, the key on the boot could be set to: 1)Open, 2)Lock/unlock with central locking, 3)Fully locked independent of central locking.
Ere, who you calling Jason then :?
Marcus
Sorry Marcus, corrected now, all my fault looking at laptop screen on coffee table through several empty bottles...hic
Help needed if possible.
1991 G463 300d 5 door.
Central locking problem I think ?
My G has the MB alarm fitted and when I got it one press of the alarm fob would lock all doors and press again would open them as should happen when working correctly. Then one day when nothing else was done to the G, things started to go wrong.
Now when you press the alarm fob the three rear doors locks pull down and then as soon as they are down flick back up again. The alarm is set on but the doors are open.
As an aside the door light switch on the front drivers door does not turn the interior light on either.
Since this has happened I have taken off the front door cards to check for broken wiring but to no avail.
Where do I go next ?
What else can I check ?
Am I right to believe my problem is the front doors ?
Does the interior light issue affect the locking signal ?
Is there a way to isolate the problem to show me which door is wrong ?
Should I need to replace a CL motor in a door are they the same as the W124 series ?
Any help offered would be much appreciated.
Regards,
Mike
PS I have looked at previous posts and some mention a vacumn system which no evidence of in my vehicles doors.
I have the same MB alarm remote setup as you and it has on occasion carried on as you describe.
If a door fails to lock when you press the button then they will all open again to indicate a fault. Therefore, not leaving the car unlocked accidently. The alarm is in parallel but remains armed. So all is doing as it is supposed to.
When you say that the 3 rear doors lock, have you noticed whether either of the front ones lock also? Normally only one solenoid will fail to operate which triggers the fault. There is no vaccum on the 463s that is the earlier system.
On the door hinge area there should be 2 rubber press switches .One operates the interior light and the other allows the windows to be wound down when the front doors are opened with the key off. One of them also activates the alarm but I don't know which. The interior light problem is most probably a dirty contact. Remove the rubber switch and clean it. The smaller one is the light.
None of the above is the locking problem though. If you keep locking the doors do they eventually work? Mine would sometimes fail to lock the first time but do so on subsequent attempts. I would use the key in the door to un/lock the doors as I think the solenoids would get sticky or dirty.
If the solenoid has stopped working entirely then you need to pull the panel off the door and connect the power to it directly to eliminate the switches upstream. Connect the power one way and it locks and reverse polarity opens. If that doesn't fix it then it's repair/ replace time.
Further on my story goes.
Roly thanks for that.!
Tried the passenger door lock with the key and all other doors except the drivers door, lock and unlock successfully.
A previous owner must have changed the drivers door barrel lock as I dont have a key for it and hence can't try from that side with a key.
This seems to suggest its the drivers side that is my problem.
Is it the wiring loom to the door and onto the solenoid or is it the solenoid itself? Any thoughts would be most welcome!
Regards,
Mike
PS. I already had removed all contact door switches and cleaned them thinking that was my problem, but to no avail. Mind you (thanks, Roly) I never new what either one was for and what each controlled.
The easiest thing is to remove the driver's door panel and directly connect power to the solenoid to see what happens, swapping polarity also. I think when the central locking sends a signal to the doors , it is only for a second or so. So you could put a multimeter on the connector and activate the locking using the rc to see whether you get a pulse of power.
Hi All,
This weekend I tried it. I locked the doors from the passengers side door and as previously described four out of five doors locked. I then pressed the alarm fob to set it and away I went.
Came out the following morning to find the alarm still set but all the doors with the buttons up(unlocked) but for the passenger front one which I had used the key on. The alarm was still active.
Question : My three rear doors cause the interior light to come on when opened which is correct, fine. My front doors dont trigger the light but do trigger the alarm, could my light/alarm problem be causing my c.l. problem?
All help will be appreciated.
Regards,
Mike
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