i checked the trailer last night and the previous wiring was one line on the left side coming off the bundle. that line splits off into to lines, one to the right side (split again for front and rear axle), and another one to the left side brakes (split again for front and rear axle). then each individual brake is grounded to the trailer frame.
does this sound right?
'08 JKU Rubicon.....mall crawlin' and baby haulin'