2001 Expedition Brake light do no work when vehicle is in drive
 

I have a 2001 Expedition have changed the brake light switch three time last time replaced with oem switch. We install new switch and all three lights work when testing while vehicle is in park. The problem is that when I am driving and apply the brakes the hatch light works but not the left and right brake lights. Any ideas. This is driving me crazy.:mad: