I have a 1999 753 F series with hand controls which when working is nice but more often than not they aren't working. I have checked electrical plugs for corrosion. It seems like no rhyme or reason for when it happens. It sometimes will work after I mess around checking connections but not sure if that's just coincidence. Does anyone know what it would take to convert to foot controls? Getting real sick of it not working when I need it. By the way it has 3200 hrs. Any help would be appreciated.