Motor/gearbox upgrade kit for compatible pre-2006 Kwikee 25 Series electric RV entry steps, including IMGL assembly, 510 control unit, and door switch.
The Lippert 379804 is a Kwikee step motor/gearbox upgrade kit designed specifically for compatible Kwikee 25 Series electric entry steps. It is intended to update original step motor systems on pre-2006 Kwikee step models.
This kit includes more than just a motor. It includes the IMGL integrated motor/gearbox/linkage assembly, 510 control unit, and door switch, allowing older compatible steps to be updated with the newer integrated motor/gearbox control package.
Updates compatible older Kwikee step motor systems
Designed specifically for compatible Kwikee 25 Series electric steps
Includes matching 510 control unit for the upgrade setup
Includes door switch assembly as part of the conversion kit
Lippert 379804 is designed for compatible Kwikee 25 Series electric steps and is intended to update original step motors on step models made prior to 2006. It is not a universal Kwikee motor kit and should not be assumed to fit other Kwikee step series, later IMGL systems, Revolution steps, Platinum steps, Coach Step assemblies, or non-Kwikee step systems unless verified. Confirm the step series, production era, linkage style, existing control style, step ID tag, wiring, and motor/gearbox configuration before ordering.
Before Starting: Confirm the step is a compatible Kwikee 25 Series electric step and that this upgrade kit is the correct conversion for the existing pre-2006 motor/control setup. Disconnect 12V power to the step circuit before service and support the step so it cannot move unexpectedly. Basic Replacement Steps: 1. Confirm Step Identification: Verify the Kwikee step series, production era, existing motor/gearbox, control unit, door switch, and linkage style. 2. Disconnect Power: Remove 12V power from the step circuit before working near the motor, linkage, wiring, or controller. 3. Document Existing Setup: Photograph the old motor/gearbox, linkage, control module, wiring, door switch, and step frame before removal. 4. Remove Old Components: Remove the original motor/gearbox, control unit, door switch, and related hardware according to Kwikee/Lippert instructions. 5. Inspect Step Mechanism: Check pivots, link arms, bushings, frame, gear area, and step treads for binding, rust, wear, or damage. 6. Install IMGL Assembly: Install the integrated motor/gearbox/linkage assembly in the correct orientation. 7. Install Control Unit and Door Switch: Mount and connect the 510 control unit and door switch according to supplied instructions. 8. Secure Wiring: Route wiring away from moving step components, pinch points, heat, and road debris. 9. Restore Power and Test: Restore power and test step extension/retraction while keeping hands and tools clear of moving components. 10. Final Function Check: Confirm the step responds correctly to door movement, ignition override, and obstruction/stop behavior before use.
Package Contents: • IMGL integrated motor / gearbox / linkage assembly • 510 control unit • Door switch assembly • Installation hardware and instructions as supplied by current manufacturer packaging NOT Included — May Also Need: • Complete step assembly • Step frame, treads, pivot arms, or step platform parts • Additional wiring harnesses not supplied with the kit • Mounting hardware not included in current packaging • Replacement step light • Battery, fuse, or RV wiring repairs • Diagnostic tools or 4-way step test plug • Professional step service or linkage repair This listing is for the upgrade kit only unless otherwise stated. Confirm current manufacturer packaging if a specific switch, bracket, linkage, or hardware item is required.
To confirm compatibility before ordering, have the following ready: • Kwikee step series number and step identification tag photos • Confirmation that the step is a 25 Series application • Approximate step production era or original control/motor style • Photos of motor, gearbox, linkage, control unit, wiring plugs, and door switch • RV year, make, model, and floorplan • Failure symptoms, such as no movement, clicking, intermittent operation, blown fuse, step reversing, or binding • Whether the step frame, linkage, pivots, control module, and wiring have already been inspected Why this matters: A non-working step may need an upgrade kit, but it may also have low voltage, bad ground, damaged wiring, failed door switch, seized linkage, bent frame, or an incorrect control setup.
Match this kit by Kwikee 25 Series identification, pre-2006 step application, linkage style, control setup, door switch wiring, and step ID tag. Do not select it by “Kwikee gearbox kit” wording alone.
If the step still does not operate after installation, check 12V power, ground, fuse, door switch, control wiring, linkage movement, pivot lubrication, frame condition, and step identification.
Electric RV steps can move suddenly and may pinch, crush, or injure hands and fingers during service. Disconnect power before installation, keep hands and tools clear of the linkage, support the step as needed, and test operation carefully after repair. Do not use a step that is loose, bent, binding, partially deployed, or operating unpredictably. Use a qualified RV technician if step identification, wiring, control diagnosis, or linkage repair is uncertain.