If anyone has the above could they please look up the fitting of Vx wiring loom for a towbar,1999 mini-facelift, saloon please.
As i have a loom and apart from the main rear lights i can't see where the rest of the loom plugs into.
TIA. 
http://www.omegaowners.com/forum/YaBB.pl?num=1193501993
Is there any more info? :-?  Wire colour & function of both the GM wires & generic 12N wiring colours.  :-?
Already answered this last week in your post in the electrical section...
Towbar cable colours are usually as follows...    
Blue ------- Rear Fog Supply  
Green ----- RH Flasher  
White ------ Earth  
Black ------ LH Side Lights  
Yellow ----- LH Flasher  
Brown ----- RH Side Lights  
Red -------- Stop Lights  
Purple ----- Rear Fog Lamps    
Colours on vehicle harness:    
Black / Blue : Fog Light  
Black / White : Turn signal, Left  
Red : +12v permanent  
Grey / Black : Tail Lamp Left  
Black / Yellow : Stop Lamp  
Grey / Red : Tail Lamp Right  
Black / Green : Turn signal, Right  
Brown : Chassis / Negative  
White / Black : Reversing Lamp  
Adapter kit - Part No. 91149320 - provides connection between car loom and towbar wiring harness.