Question about Liftmaster, Chamberlain, Sears Door Bracket

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My house was prewired for a garage door opener well on the wall they brought the wire through and just tied a knot in it ,now each side of the garage door it has wires for the sensors so far so good right well then in the ceiling theres a hole but first off theres no cut off ends to those wires and then to top it off there not even long enough if i were to just start cutting them in half i even tried pulling at them and nothing, problem is theres a bedroom above the garage so i cant even go into a attic space to see what these idiots did anyone have any suggestions where to start here i thought the hard part was over installing the opener to the ceiling and door thanks for any help Chip.

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Usually the installers will make a not at the end of the wires so that the dry wallers wont dry wall over the wires (it hapens all the time with dry wallers).I would strip off bolth wires by the garage doors.Inside the wire their will be either four little wires or two little wires strip them as well.On one garage door twist two of the wires together so that the wires contact each other.On the other garage door where the other wire comes out of the wall strip the wires (if you have four wires coming out of it you will have to use a multi meter and connect the ends of the probes of the multi meter to the same two collers of wire that you twisted together on the other door.If you have only two wires coming out of it then do the same thing you just wont have to worry about which two collers you are using.I.e. I twist red and black together on one door then I connect my probes to the red and black on the other door.Using the resistance option or the tone option on the multi meter you should be able to tell if this is a single line like I think it is.If it is a single line then the meter (if on the resistance option will read anything other then o.l.).O.l. standing for open line. (If on the tone option then you will hear a tone).If this is one line then you will just have to go to the hole in the ceiling and cut the wire in half using daulfins or barell conectors and a little wire you should be able to extend you wires.(I asume on the door opener their are two different terminals to connect two different doors).DONT pull on the wires.This will only make things worse.per state law the installers have to staple their wires to the studs and pulling on these wires can lead to them breaking off in the walls or them shorting out.It is comon for a low voltage electrican to only use one wire when installing two doors close together they just forgot to leave a little extra wire in the hole in the ceiling and then cut the one wire into two sepret wires in that same hole.

Posted on Jul 28, 2009


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