What brand steps do you have? If they are Kwikee, there are troubleshooting steps you can take, but the quickest is that the yellow wire at the step must have 12 VDC when the key is on. You can disconnect the main connector at the step and check there. If you have voltage, and the step operates normally otherwise, the controller is likely bad. If you don't have voltage, check the applicable fuse for that circuit.
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2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.
Retired USAF
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