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

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2000 sears craftsman garage door opener

I have rebuilt the unit, but the roiginal owner of the home did not eave the wiring diagram for the sensors and push button, I have a newer version but it has outlets for all 6 wires sears unit only has 3 they look like this 1 (red) 2 (NEC CL2) 3 (24 V)
I just need to know what wires go where. I do know that the 2 door sensor wires (4 split) are paired to give 2 lines and I assume that one goes to 2 and the other to 3 but am unsure of where the second line from the wall push opener goes

any ideas?

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#1 wire with red trace –
#2 all white wires with no trace
#3 wires with black trace

Posted on May 29, 2010

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