Lippert's Tread Lite 24-inch powered RV steps are available as a single-step assembly (353542) or a double-step assembly (353543). Both are designed to extend and retract with the RV entry door and use a separate control module, wiring connections and step mechanism.
Use the factory mounting and wiring drawings below when identifying the original installation. If you are replacing only the control, Lippert lists 334850 as a replacement module for these Tread Lite power-step models.
Tread Lite step models and replacement controller
| Manufacturer part | Model | What it includes | Shop or identify |
|---|---|---|---|
| 353542 | 24-inch single electric step | Step assembly, switch and harness | View Tread Lite single step |
| 353543 | 24-inch double electric step | Step assembly, switch and harness | View Tread Lite double step |
| 353620 | 30-inch single electric step | Different tread-width assembly | Match the 30-inch mounting drawing |
| 353621 | 30-inch double electric step | Different tread-width assembly | Match the 30-inch mounting drawing |
| 334850 | Tread Lite power-step controller | Replacement control module | View Tread Lite controller |
Lippert lists all four step assemblies in its Tread Lite range and identifies 334850 as a controller replacement for 353542, 353543, 353620 and 353621. Always match the installed part label before ordering.
Tread Lite 24-inch and 30-inch mounting diagrams
The installation drawing shows separate 24-inch and 30-inch step-base dimensions and the slotted mounting holes. It also identifies the front edge of the mounting plate. Confirm the frame space and bolt locations on your RV; the tread width alone does not establish installation fit.
Lippert Tread Lite 24-Inch Electric RV Step Wiring & Parts Guide · product photo reference
Part 353542
Part 353543
Part 334850
The Lippert 334850 is the controller; 353542 and 353543 are complete step assemblies. Wiring details remain in the original PDF.
Open original manufacturer drawingTread Lite controller and wiring diagram
Lippert's wiring drawing identifies the door proximity switch, hold/cycle switch, ignition input, porch-light input, ground, 12V supply, motor and brake connections. The ignition circuit is designed to retract an extended step when the entry door is closed.
Factory drawing 2: original document
The Lippert 334850 is the controller; 353542 and 353543 are complete step assemblies. Wiring details remain in the original PDF.
Open original manufacturer drawingTread Lite complete steps and controller photographs
Compare the single-step and double-step assemblies with your original equipment. The 334850 module is a service part, not a complete electric step or a motor replacement.
Installation and service identification
Lippert's installation procedure calls for checking the step's position and squareness before tightening the mounting hardware. The manual identifies four mounting bolts with matching nuts, and a final tightening torque of 20 ft-lb for that installation. Follow the instructions for your actual mounting structure.
If a Tread Lite step is not operating, first confirm the step assembly number and existing controller part label. The factory wiring diagram can help identify which switches, connections and power inputs belong to the system; it does not establish that an unrelated controller is interchangeable.
More electric-step references
Manufacturer documents: Lippert Tread Lite OEM installation manual; 334850 controller specifications.