Originally Posted by Mopar or No Car
My cooling fan went haywire and ran without stopping after the car was off no matter the coolant temp -- I had to d/c the battery to kill it. Unless you are an electrical genius you won't be able to determine which part is failing. I had to replace the relay ($500+) after dealer diagnostics. Good luck.
Are you talking about the ENGINE fan? That would be the Fan Control Module - and I don't think I have ever heard of a verified failure of the FCM - not saying that it can't happen.