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

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Need to know wiring scheme on back of garage door opener

I have a Craftsman model 139.53637srt garage door opener. I disconnected the sensor wires on the back and cannot remember the scheme to rewire. There are two wires (one for each door sensor eye) with two leads. Any answer?

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Wire with red trace to red or #1 connector

wires with no trace white or #2

wires with black trace gray or #3

Posted on May 29, 2010

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Join both wires the white one with the white one, and the white with black strip, with the same other, then connect it on the back of the motor the white wires with the white terminal (a white square) and the white with the black strip with the black terminal (a black square) .. check that both leds of sensors are on

Posted on Mar 15, 2009

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

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#1 wire with red trace –
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