I have a 2018 Hisun Sector 250 that the DC power port has no power. I don't think it ever did so that was my bad for never trying something in the port. I have a repair manual, not sure it covers a 2018 year, but the wire diagram shows the power port on the same line/fuse as the horn and the horn works. Should it have power with the key off or only when running? Any ideas? Thanks Bill L