ok so a few weeks ago i noticed my windshield wiper wasn't working right (it would wiper 1/2 way). so i took it off to see if i could see what was wrong. i saw that the black plastic looking screw (holds that blue plastic piece and the circuit board together) was all messed up so i went to lowes to look for a replacement but couldn't find one so i ended up getting a new wiper. well the problem i have is that when i took it out, it didn't have that plastic housing with the circuit board and all that, all i saw was a gear with glue stuff on it. Isn't it supposed to come with everything or did i get ****ed... thanks for you your help.