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.