Radiator fans on, ignition off.
Was wondering if there is a simple way to allow the radiator cooling fans to be 'rewired' to allow them to carry on working once the ignition is off? It drives me mad that they will switch off with the ignition even though they were judged to be necessary just seconds before when the engine was running, surely if they need to be on they should remain on even with the ignition cold particularly as stopping will prevent any airflow at all and indeed increase the overheating and possible damage due to heat-soak. I have made this alteration to my cars in the past, but don't want to cause problems with the more 'complicated' monitoring/switching in a modern car. Thanks in anticipation.