If you have checked the fuse and it is ok the only thing you can do is replace you remove the two screws in the sun glasses/ garage door compartment and pull down un hook the wiring harness and hook up the new.. real easy to do
On a 1999 Explorer there is a 7.5 amp fuse in location # 10 of the fuse panel for the overhead console.
Where is the power connection found for the temperature and direction in the explorer sport trac
Under the driver's side front corner of the car, behind the bumper.
You can find that info in the owners manual.
On my 1995 Ford Explorer XLT the CD changer is in the center console , yours should be the same or possibly under the drivers seat
The 2012 Ford Explorer has double overhead cam (DOHC).
The 2008 Ford Explorer has single overhead cam (SOHC).
The 2002 Ford Explorer has single overhead cam (SOHC).
The 2007 Ford Explorer has single overhead cam (SOHC).
The 2014 Ford Explorer has double overhead cam (DOHC).
The 2001 Ford Explorer has single overhead cam (SOHC).
The 2013 Ford Explorer has double overhead cam (DOHC).