I recently joined a hi-lo camper facebook group, and someone was looking for the wiring schematics.  It's in my manual, so I.m uploading them for others to find.  Old manuals are hard to come by, and I think for the most part that my 1989 is similar to the others.  At least in similar years.  Hopefully this will be helpful to others! Here's a link to the file! https://1drv.ms/b/s!Avf8qR9l3KsxiKkg0wvRCzwQLoJz2w