ENGINE FANS WILL NOT GO OFF WHEN CAR IS STOPPED AND ENGINE IS COLD.
I need more specific information on the problem you are having.
Is the van overheating? Is there enough coolant in the cooling system? Is the check engine light on?
There is information on a cooling fan relay problem which involves replacing the relay and reprogramming the PCM with an updated program; depending on the year.
If you can supply me with the year, make and model, engine size (8th digit of VIN) and a more detailed description of the problem I can give you a more detailed answer.
Get back to me when you can.