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Question About Craftsman Garage Door Opener 139.53978SRT
which wires goes where (have three wires). old uni...

which wires goes where (have three wires). old unit had only three receptors hook ups & new unit has four receptors, 1 red,t two whites in the middle & grey on the right.

Asked by Toshio on 11/23/2012 1  Answer

ManualsOnline posted an answer 11 years, 5 months ago

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