Better to drop Enda Ward at EndTuning a shout, he does chips for the TDS, ten min install and no wiring butchery.
resistor mod is an utter bodge.
http://www.endtuning.com/tdschips/
resistor mod is an utter bodge.
http://www.endtuning.com/tdschips/
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.