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Scott_M's avatar
Scott_M
Explorer
Sep 19, 2020

Odd Electric Step Problem

Our step has been working fine for a couple of years. Today, I was giving the RV a bath and went to back it into the carport and I heard the steps go out. I turned the RV off and the steps go in.

Even with the step over ride switch off, the steps extend when the you turn the ignition key to the start position.

With the ignition off and the step switch on the steps work fine. Extend when the door opens, retract when the door closes. Turn the step switch off while extended, they stay extended.

Any thoughts? It doesn't appear to be the motor. Maybe the controller module? Ignition interlock?
Class C

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  • Scott_M's avatar
    Scott_M
    Explorer
    Sep 19, 2020
    I have looked for fuses and can not find any that are designated for the step. What size fuse am I looking for? It should be a chassis fuse and not a coach fuse correct? It's on a Mercedes Sprinter chassis. Looked at fuse panel on chassis, there are about 30 fuses, no index on cover. Since this was equipment installed at Thor conversion factory, I doubt the Mercedes manual for label the step operator.

    Battery under floor and have not opened it up yet.

    Grounds are both good and clean, no rust or corrosion. Cleaned both ground terminals.
  • enblethen's avatar
    enblethen
    Nomad
    Sep 19, 2020
    There is two grounds in Kwikee steps. One for the control and one for the motor. Suggest checking both.
    Make sure the two fuses are good. One is from chassis battery, one from coach battery.
    Chassis battery power runs motor, chassis battery is control.
    Make and model of step?

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