LiftMaster 3800 Support Question
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Question posted by ruckustak on November 23rd, 2020
On The Sensors It Showing Two Wires Going Into The Quick Connect I Have Four Wir
Current Answers
Answer #1: Posted by INIMITABLE on November 24th, 2020 6:00 AM
The motor has one big white wire that has 1 red and 1 black wire inside of it, and it connects to the connector on the logic board labeled P1 right next to the transformer wires.
Note: The plugs for the motor and the transformer share the same connector (P1) but the cables are keyed so you know in which direction the cables have to be inserted. Inserting the cables backwards into the connector can damage the board, connector, and can also affect the operation of the unit therefore you want to make sure the cables are inserted in the right direction.
The travel module has a wire harness that has 5 wires: 1 each of blue, black, yellow, orange, and red. The travel module wire harness connects from the travel module to the connector on the logic board labeled RPM P2.
On the logic board there will be a black and red wire that are soldered into the board and has a white plug at the end of the two wires. The white plug goes through a hole at the bottom of the red casing which is the connection for the battery backup. The plug can only go through the hole in one direction therefore if the plug is not going through the hole easily, rotate it until the plug inserts properly and with ease.
The power cord has 3 wires: green, white, and black wires. The black and white wires connect to the 2 blue wires on the transformer. The green wire is the ground wire and screws to the metal housing.
I hope this is helpful? PLEASE "ACCEPT" and mark it "HELPFUL" to complement my little effort. Hope to bring you more detailed answers
-INIMITABLE
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