No buses from one resort to another. To do it by bus, you have to use one of the parks or DTD as a transportation hub. Take a bus from your resort to a park or DTD, get off the bus there, then get on a bus there that is bound for the resort you want to go to.
Are there any buses that run from the Wilderness Lodge to the TTC and vice versa???
Disney's Polynesian Resort - 1984, 1985, 1987, 1988, 1994
Disney's Contemporary Resort - 1986, 1997
Disney's Grand Floridian Resort & Spa - 1989, 1991, 1992
Orange Lake Resort & CC (Off Property)- 2002, 2003, 2005
Disney's Wilderness Lodge 2007
Disney's POP Century Resort 2012
Disney's Beach Club Villas 2012