Looks as though the relay for the fans are still energized if you had to pull one to shut the fan off. The relay could be bad and the contacts are sticking, or you have a short that is still supplying power to the relay when you turn the engine off.
Your car have a fan controller/resistor
V7 are the two fans
J26 and J135 are the relays
J135 relay is for high speed as you can see that it bypass the fan controller/resistor. If the low speed fan is running I would check relay J26. check the relay and the circuit that supplies current to energize the relay.