When you turn on the key switch c 28 fault turn on before you try to even travel or lift. The unit does not travel or lift or even honk the horn. Battery volatge was low at 24 volts. I charged it for a hour just enough to test components. I have 25.5 volts to one side of the line contact and 24.4 at the other end. Checked fuses, relay, master switch and key switch all at 24.4 volts. Line contact does not activate I assuming because of fault code. Im getting 24 volts to my handle controller. Any help would be great.