While adding a battery monitor (AiLi) I had to obviously disconnect my batteries to install the shunt After finishing the install I noticed my STEP would no longer work. The STEP button would light up when pressed, but that is only to keep the STEP deployed. I tried opening and closing the door. I tried turning batteries (main and aux) on and off. I tried turning the ignition on. Nothing.. it just didnít work.
The fix was to START the engine! After doing that the STEP started working as normal.
So if you have a weird acting STEP, try starting the engine