Put the ladder on the ideal side of the door between the wall and the front of the extension garage door spring. Search adjustment holes on the course. Upper groove connecting to the vertical groove with a straight bracket. The bracket that is connecting has holes on the top. The end of the cable attaches to those adjustment holes for the cutting and the S-hook. Grasp the lower part of the cable with one hand and pull it against the wall just enough to give slack on the S-hook and trim .
Garage door spring – Most single car garage doors with extension springs lift the door weight when you open or close the garage door. An extension spring is usually on all sides of the door above the upper door track. A little wider garage doors use two extension springs on each side, but these are not common. The springs connect to the rear track holding brackets. Door cable passes over a pulley and tracks through a pulley near the front in the spring.
Fully open garage door spring. Attach a pair of vise grips in the curve of the door track, with handles on the vise-grip under the roller at the bottom of each side of the door. The weight of the door will rest on the handles of the vise-grip. The power cord garage door opener, for your door employing the opener. Setting up in the opener motor and pull the opener power cord.