If you like to inspect motor, you do not need to take off metal cover. Just unscrew three motor bolts, take out motor, connect it and try the motor, if it is good, than it is raiser assembly. Than you must remove metal panel. To remove it, first unscrew metal clips holding bottom of the window. You must either remove the window or (I would do this), tape it to top of the door so it doesn't fall down. when removed metal panel inspect cables, pulleys and plastic parts.