1999 Infiniti G20 Q&A

1999 Infiniti G20 Question: humming sound

after car is turned off, there is a humming sound that contiues for 15 secs. -
Answer 1
Is this humming sound from the engine compartment? If so it is probably the electric cooling fan on the radiator and this would be normal. If inside the car again I wonder if it could be related to the heating and air conditioning fan that is switching off but you hear it rotate while is switching off. -
Answer 2
There is a humming sound that continues constantly after it is shut off -
Answer 3
Fuel cap - pressure equalization. Normal. -
Answer 4
If sound is from rear of car it could be the antenna retracting or attempting to retract -