12 PIN CONNECTOR.
As a starting point, we know all Vauxhalls of that era use the same layout as the Kiekert module with the 12 pin connector as used in the Cavalier mk3 / Vectra-A.
The Cavalier uses 11 of the 12 pins, whereas other models do not have an input from the rear hatch / boot lock switch or do not have the window-lifter / full-closure option.
28 PIN CONNECTOR.
The Astra and Zafira use primarily Robert Bosch control units.
And in typical Vauxhall Opel style some pins within the 28 pin connector are the same... and some are different.
On top of this - there are versions with and without anti-theft warning.
Central locking only - Flat casing, similar to Vectra and Omega units.
And - the Astra locking module with anti-theft function.
You can tell by the thicker section across the top, which contains an inclinometer / motion sensor
I have never worked on the Bosch unit, but here is the pin-out.
28 pin connector.
1 - red/blue - driver's lock switch pin 2
2 - red/white - driver's lock switch pin 8
4 - black - ignition live from fuse ***
5 - brown/red - power sounder "-" ***
7 - green/brown - ultrasonic sensor *** (inside interior light)
8 - blue/red - ultrasonic sensor ***
10 - black/blue - driver's lock switch pin 4 (deadlock)
11 - red/white - soft top ***
12 - red/blue - ultrasonic sensor ***
14 - black/white - out to indicators using the yellow Omega relay.
15 - grey/white - door contact switch
16 - grey - door contact switch
17 - brown/black - boot / trunk light switch
18 - red - battery live from fuse.
19 - brown/red - power sounder "+" and battery live.***
20 - brown/green - bonnet / hood switch
21 - brown/white - diagnostic link
23 - brown/violet - immobiliser
24 - red/yellow - window lifters & sunroof
25 - brown/violet - tell tale LED inside hazard switch.
26 - black - pane break sensor
28 - black - independent heater ***
*** = different from the Vectra and Omega units.
