There is provided a cooling fan drive circuit for driving a pair of cooling
fans. The circuit comprises a first power supply line for providing a
power connection to each of the fans from a first power source. The
circuit further comprises a second power supply line for providing a power
connection to the first fan; and a third power supply line for providing a
power connection to the second fan. The second and third power supply
lines are arranged, in use, to provide separate connections between the
respective fans and a power source other than the first power source.
