Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Wiring the opener and sensors

I want to install a sears garage door opener but dont know how to wire the opener for the wall mounted pad and sensors

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The wall button gets the red and white wire. The safety eyes use the black and white wires. There are two types of attachments on the back of the openers. One has three screws. On this type the 1 is for the red wire, the 2 is for all white wires, and the 3 is for all black wires. The other type has four blocks and you just match the color to the wire color.

Posted on Jan 30, 2009

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Hi, Working with a Sears 1/2 HP garage door opener that can be activated by a wall button or remotes. No key pad. About a year ago, I replaced the old motor, since it only turned in one direction. I...


The opener will not work without the sensors. Make sure you don't have a broken wire going to the sensors. Make sure the small light on each sensor is lit and not flickering. If you cannot get both lights to come on you have either a bad sensor or a wiring problem. If the main light flashes 10 times it is definitely a door sensor problem. The wall control may be bad now from usage. Remove it from the wall and short across the 2 wires. If that causes the door to try to move you then know the button is bad. You can also short across terminals #1 and #2. That would eliminate bad wiring to the wall control. Make sure the connections on the back of the motor unit are tight and that the 2 white wires from the sensors go to terminal #2 and the white wires with black stripes go to terminal #3.

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The wiring should be.

Terminal #1 - White wire with red tracer from wall control.

Terminal #2 - White wire from wall control and a white wire from each of the sensors.

Terminal #3 - A white wire with black tracer from each of the sensors.

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1 Answer

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2000 sears craftsman garage door opener


#1 wire with red trace –
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1 Answer

Sears craftsman garage door opener


HOLDING DOWN THE WALL BUTTON OVERRIDES THE SAFETY EYES.
WHEN HOLDING IT DOWN MAKES THE DOOR CLOSE PROPERLY THE PROBLEM IS IN THE SAFETY EYES.

ARE BOTH LEDS ON? - CHECK FOR A LOOSE OR BROKEN WIRE.
ARE THE EYES WIRED CORRECTLY?
ARE THEY AIMED AT EACH OTHER?

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first guy has the mounting screws tp tight or the wire is preventing wall station for sitting flush against wall....second guy check your safety eyes...

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