I just installed two pair of garage door electric eyes.
Garage door switch wiring.
Step 1 getting the garage door opener wall button.
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Locate the bell wire that connects the wall switch to the garage door opener.
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If you need assistance just google it and you ll see a few 2 5 minute videos.
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Enough wire for two garage doors.
If the switch is set too high for your opening the door may not close.
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Loosen the two terminal screws on the side of the opener where the bell wire attaches using a screwdriver.
Not complicated to do at all.
Depending on the model and manufacturer it works with either a battery or a wire.
I needed 23 feet for each side left and right sides and had two garage doors so 100 feet is exactly enough.
These will work with a wide selection of openers but there are always some exceptions.
In some cases you can buy universal buttons.