[W126 Coupe] central locking question

[Jim Ham]

The central locking system uses one wire for control. You momentarily 
connect it to +12 to lock or connect it to ground to unlock (or vice-versa, 
I don't remember). Either the switch in the door is not working or the wire 
is broken somewhere. Since the remote isn't working you might see if you 
can find where it's connected to the locking system. If it's in the 
driver's door the problem is most certainly a broken wire or a connector 
that's gone bad. I'd look carefully at the alarm installation, some 
installers are not very careful :-(

Regards,

Jim Ham



At 11:39 AM 6/6/2005, you wrote:
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>Hi gang,
>
>My 1987 560SEC recently started acting up where I realized the remote for 
>my alarm wasn't locking the driver's door. This happened about 2 years ago 
>and I replaced the vacuum pump in the trunk after swapping with a known 
>good one from a local fellow lister. I'm just curious if I have the same 
>problem again or something else maybe?
>
>Driver's door will lock with key, but only that door. Everything will lock 
>if I use the key in the trunk. Nothing will lock if I use the remote for 
>the alarm. I'm just stumped why the trunk would lock everything but not 
>the driver's door, and how this could be the pump, wouldn't the pump work 
>the door as well as the trunk way?
>
>Thanks,
>Markus
>
>
>
>
>
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