I know this may sound dumb,but I cant get the 3rd light out to change the bulb on my 94 F350,I removed the 2 screws,but the fixture wont come all the way out,almost like it has a clip keeping it from coming all the way out.please help

 

I bet the housing is melted on the bottom under the bulbs causing it to hang up on the cab.

 

I've seen those housings melt also, that could be it.

 

Thanks guys,thats what it was,the housing had melted a little on the bottom so I had to use a butter knife and pry it a little to get it out.Fixed