Electric steps
I would check all connections especially ground wires, there are 2 green ground wires make sure they are both clean with no corrosion where they bolt to frame and under the step.
Plug and unplug the 4 way connection to the step several times to help clean the connection
If this doesn’t work probably bad controller
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1998 HR Endeavor Cummins ISB 275 / Banks Allison 3060
20014Jeep Wrangler JKUR with M&G air brake with breakaway
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