headlight issue, cant find related problem with search
 

so drivers side headlight motor was bad, replaced, and now the motor works but the light only goes up or down if i turn the red knob a little bit first, almost like its binding up somwere but i cant find out were, passenger light works fine, anyone got any suggestions of things to mess with so this thing goes up and down on its own?

anyone, please, need to get this figgured out

someone, anyone,