Xsara Picasso (1999–onwards, 1.6–2.0 petrol/diesel). Citroën DS3 (2010–2013. 1x Heater Resistor Wiring Loom. If your blower fan only works on high speed or not at all, this loom is often the fix. It’s a common fault — and this part gets you back to full airflow in minutes. ).