Its a Astra Estate 2.0 Turbo diesel 1998. Turned the engine off tonight when I got home and the cooling fan kept running as well as the air con fan. I thought it was strange but thought the engine must be warm so engine management cooling the engine down. Went back about hour later fans still on battery about dead. Recharged battery and as soon as you reconnect the battery the cooling fan comes on. Had to remove fuse 4 in the engine bay to turn the fan off. Any idea's anyone?