power outlet problem
 

I am new here and need help. I have an '02 Silhouette that has been a great vehicle for me but I have a problem with the power outlets (cigarette lighters) located by the DVD player. I have had a GPS and phone charger plugged into them since purchasing the vehicle 3 years ago. After having problems with the battery draining a few weeks ago I unplugged both accessories which were working. When I went to use the accessories again there was no power. There is no other electrical system effected. I have checked all the fuses and they seem intact. I am unable to find a schematic that helps me trace the problem. any help or advice is appreciated.