Originally Posted by 203horhey
Fords are sticky sometimes, try pushing it in tighter then push tab and pull. If that doesnt work use a small flat head screw driver and go from the opposite end of the push tab and lightly push it up.
^This. If you actually push the bulb holder IN against the wiring harness end piece this will relieve the friction between the two parts. Then depress the tab and pull firmly.