Hi
In most of the new cars, there are build in Follow me type lights, and as many things in Xantia that are out of the list.
My first "hack" was to add relays to Low / High Beam Lights and to take the amperes out of the stalk switch in the cabin. What i have done was first to remove the original 10A fuses (A1-A2, B1-B2)

On A1/B1 pin are the relay controls, from relays out via 10A fuses goes to A2/B2.
Later on(few months), it come the circuit for "follow me", based on NE555 timer and variable resistor.With the second one you can change the delay based on: T(sec) = 1.1xR(ohms)xC(farads) or in my case:
T(sec) = 1.1 x 80 000Ohms x 0.00047Farads = 41.36sec


Maybe the circuit is far from perfect but do the job. Feel free to test,modify and use.Good luck
