Xantia loss of headlanps

[mistuart]

I have lost both headlamps,dashlamps,fog lamps and sidelamps on my 1999 Xantia HDi Exclusive. All fuses checked and double checked by autoelectrician found to be ok. Problem traced to a missing 12V to the headlamp stalk switch(a temporary supply cured all but dashlights)could possibly a failed connector or broken cable but I cannot get a circuit diagram anywhere. Does anyone know of a diagram/cable routing from battery to stalk or has anyone had this problem before?