Hi

Since i bougth my '89 S4 the central lock, has been out of order
The PO put in a new lock, but could not find out how to connect the wires.
Anybody who knows how to connect the colours ?



Mads

 

Mads,
According to the wiring diagrams the lock tail should have Brown, White & Green like the left side in your photo.

The car loom should have Brown Brown/Red(stripe), Brown/Green(stripe). This does not seem to match the right side in your photo... do you have the right lock?

Good news is its easy to find out. You have a brown in both pictures and this is just a ground - connect these together. If you switch the other two over it will not do any harm... my car had that connector jammed together in reverse (doesn't really fit...!) when I got it. the locking was bizarre but no harm done...

If the lock is on the right in your photo...

Test the lock with the key and a multimeter. In the normal position there should be no connection between brown and either of the other two colors. When held in the anticlockwise (lock) position it should connect brown and brown/red on the factory loom (white on yours) so figure out which one this is, the other is then obvious. Alternatively just try it one way and see if it works correctly - if not swap it.

However - I suspect from the connectors that the new lock is actually on the left:

So on lock Brown = gnd, Green = suspend alarm (& open hatch) White = lock doors/arm

Unlock the doors with the key - then on the factory loom (with the odd colors) take the brown and touch it to the one of the other leads - does it lock the doors? if not try the other lead connected to brown instead.

Note the rear lock will lock the door and arm the alarm but will not not unlock the doors (although it will disarm the alarm until the hatch is closed). Once you figure out which locks the door thats the one that needs to go to White on the lock

Hope this helps you...

Alan