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MG MGF Technical - Door Lock Wires

I am considering building a little circuit that would close my windows when i double lock my car. The idea is that it senses a pulse (or a high voltage) going to the locking mechanism but the only problem is that upon looking at the connections to the door lock mechanism i find that there is about 10 wires going into it.

Does anybody have any ideas which wire(s) I could use to do this?

Cheers

Darren
Darren

As usual Dieter is your friend...

http://www.mgfcar.de/schedules/

One note, the colours are discribed on another page- be carefull here!
and the colours of the wires are the colours in the LOOM- that is before the connector to the lock mech (on later models)
Will

ZzzzzzZzzz :) and the sender of the stuff for the other site was Will. :))
http://www.mgfcar.de/door_slot/index.htm

Will, any news from the switches try and error ?
Dieter Koennecke

Hi Darren,

I am also working on a circuit for the locks, but not to do with the windows so no worries there.

However I have been sent the following info which might help


---

Locking

When the alarm ECU receives a lock signal, from the remote handset or the driver's door lock barrel switch, a feed is connected to the O wire between the alarm ECU (C0061) and the door locking motors (C1449 and C1451). The alarm ECU (C0061) also earths the K wire from the locking/ superlocking motors (C1449 and C1451), the locking motors then lock the doors.

Superlocking

When the alarm ECU receives two lock signals from the remote handset in quick succession, a feed is connected to the NK wire between the alarm ECU (C0057) and thedoor superlocking motors (C1449 and C1451). The alarm ECU (C0061) also earths the K wire from the locking/ superlocking motors (C1449 and C1451), the superlocking motors then lock the doors and disengage the door sill buttons.

NOTE: Pressing down the passenger door sill button will lock the passenger door but will not operate the central door locking system.

Unlocking

The car is unlocked by pressing the unlock button on the remote handset, turning the key in the driver's door in the unlock direction or, provided the vehicle is not superlocked, by raising the driver's door sill button. When an unlock signal is received, from the remote handset orthe driver's door lock barrel switch, the alarm ECU reverses the polarity of the locking/superlocking motor connections and the locking/ superlocking motors unlock the doors. The alarm ECU also operates the direction indicator lamps to give one long flash.

In the event of a severe crash, both doors will be unlocked by the operation of the inertia switch. When the inertia switch opens, the supply to the alarm ECU is disconnected and the alarm ECU operates the locking or superlocking circuit as appropriate.

----

Regards

Paul
Paul

Thanks all, I am suitably impressed by the information, it is exactly what I needed.

Sorry Deiter, One day I may learn to not underestimate the amount of information held in your site and make it my first port of call for information...

Cheers

Darren

Darren

LOL... no worries please :)
I have always problems myself in finding the own stuff on the site. It's not perfect.

Recommendation for all,
Bookmark the search site and try familiar key words for searching technical stuff.

http://www.mgcc.de/mgf/
---- included sites from ----
Robert Bell, Olaf Columbus, Richard Eaton, Jerry Flint, Stefan Gibney, Andy Gilhooley, Greg Hilton (FAQ), Dieter Koennecke, Nikolaj Klingemann, Manfred Kribbel, Paul Lathwell (new FAQ) , Don Liang, Andrew Phillips, Martin Poehlmann, Tom Schloesser, Tony Smith, Tony Thompson, Paul Worman, Martin Woods and last but not least,
The MG Enthusiasts' BBS (MGF data) and Dave Andrews (K-Engine).
----------------------
According to the spider logs, the search index contains 863 documents. A total number of 278185 words were found and indexed. 695462 word-endings were created.

Apologize in advance, but I do not know why that FOC special tool doesn't provide what it should ;)

Cheers
Dieter <--- no licence, no (F)un currently
Dieter Koennecke

Sorry, no real progress yet:
Dimentions the same
tags from car are like long spades - tags from new are short, holed and twisted
original are not protected against water - new are

Taking the new and straightening the tags and clipping one tag (as original din't have one!)
and the devices refit, however they do not make good contact with the electrics (all original ones were push fit) so I will take into work and solder in the near future....

Will
Will

Hi,

I built one of these beasties - it's still working after 18 months.

Beware of the back EMF produced by the door lock motors. If you want to use the door lock signal as
an input to a circuit you must use a resistor and diode to gnd to protect any subsequent electronics.

You can detect if the windows are closed by monitoring the current drawn by the
elec window motor. I used a current sense resisitor in the gnd connection to each window motor and
a couple of comparators to switch off each window motor as the glass pushes up against it's closed
position.

Ian

p.s. Dieter - I was out of the country for 4 months and owe you a reply on building this properly.
Ian Clifford

This thread was discussed between 04/06/2002 and 10/06/2002

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