This link is the closest to your model for a manual.
http://www.hilotrailerforum.com/f49/...2001-hi-lo-23/
The majority of the information is the same for your trailer and you should be able to find the cable adjustment procedure in this manual. There is also another procedure that someone has posted here just do a search for cable adjustment. Hope this helps, but its possible you have some other underlying issue from the sounds of your explanation. Good luck