hi everyone I have a Tennant floor cleaner at my job and it was working fine till about a week ago. the actuator that raises and lowers the brush head is not working. I did system test and came up with a faulty actuator or an obstruction. there was no obstruction so I went with a faulty actuator. we ordered the actuator and I replaced it, and it still is not working I am not sure where to go from here I am unable to find any decent wiring diagrams to help me out so am trying here now thanks for all of the help in advance.