The original equipment for this engine was a clutch-type mechanical cooling fan and not an electrical one. In 1998 the 5.9 L engine with the Max cooling package had an electric fan and of course your Jeep may have been retrofitted at some point with an electric fan but the specific year and engine you mention came with the manual fan.
The 2007 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2010 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2008 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2003 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2006 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2005 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2001 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2004 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2002 Jeep Grand-Cherokee is a gas-powered vehicle.
The 2009 Jeep Grand-Cherokee is a gas-powered vehicle.
1997 Jeep Grand Cherokee Service Manual click here http://www.megaupload.com/?d=VNJ4PXVP
I know the Cherokee does. If the Grand Cherokee does, check the diagrahm on the fuse panel cover. or owners manual.