The LiftMaster 41A6335 Low Voltage Wire Harness is an OEM replacement harness for select LiftMaster, Chamberlain, and Craftsman residential garage door openers. Designed to restore proper connectivity between the opener’s logic board and low-voltage accessories, it provides dedicated leads for components such as the wall control, safety reversing sensors, and other Security+ accessory inputs. Use this harness when repairing damage, resolving intermittent accessory connections, or when replacing a logic board that requires the 41A6335 interface.
This factory replacement part features a keyed board connector and color-coded leads to simplify installation and maintain correct polarity on low-voltage circuits. Installation typically involves disconnecting power, accessing the control board, unplugging the old harness, transferring the accessory leads, and seating the new connector firmly into the board header, followed by testing the wall control and safety sensors for proper operation. For compatibility, match the part number 41A6335 with your opener’s parts diagram or service manual; it is intended only for accessory/communication circuits and is not used on high-voltage mains. Always follow the opener manufacturer’s instructions and UL 325 safety practices when servicing a garage door opener.