They are saying the wires are corroded would take to much time to cut them back solder new ones in
u have a few options as I mentioned of either getting a second hand loom from a breakers or making up a new loom and cutting Out the bad section of loom then using the heat shrink joints that have the solder built in , then bigger heat shrink over that to protect the joints further
is that loom by the rear passenger side chassis plse by the wheel , thks
many of the looms can be quite big where they run front to back , if they didn’t want to cut in a new loom u would have to go back to every connector which would take a considerable amount of time
hope that helps