The Lippert Control Relay Module (part number 46-0900, SKU 368859) is the factory-specified replacement relay for Lippert In-Wall slide-out systems. It handles motor direction switching for slide extension and retraction -- no field calibration or adjustment required once installed. If your In-Wall slide is unresponsive, moves only in one direction, or blows fuses at the relay, this module is the first component to diagnose and replace.
The Lippert In-Wall slide system conceals all drive mechanics inside the wall cavity of the slide room, delivering better interior headroom and a cleaner finished look compared to exposed rail systems. The control relay module is a critical electrical component within that system -- it interprets switch commands from the coach control panel and directs 12V power to the slide motor in the correct polarity to extend or retract the room.
Because all slide components are pre-assembled at the factory and installed as a unit, replacing just the relay module is a straightforward, targeted repair that avoids the cost of replacing the entire drive assembly.
Plug-and-play OEM replacement. No relay timing or sensitivity adjustment required after installation.
Engineered specifically for the Lippert In-Wall slide architecture -- not a universal relay module.
The In-Wall system keeps all drive components inside the wall cavity, preserving headroom and interior aesthetics.
Replacing the relay module alone resolves most electrical direction-switching faults without pulling the full slide assembly.
In a Lippert In-Wall slide system, the control relay module acts as the switching interface between the coach wiring harness and the slide motor. When the operator presses the extend or retract button, the relay module energizes the appropriate output circuit, reversing motor polarity as needed. It also provides a degree of circuit protection by isolating the high-current motor circuit from the low-current switch circuit.
Common failure symptoms that point to the relay module include:
Lippert's In-Wall slide system integrates the drive motor, rack, and guide components directly into the structural wall of the slide room box. Key design advantages include: