:shocked:Well if no earth the unit just will not even work at all. save as much cable you can and replace
Crumbled part with a earth cable try getting one same width. And roll it Up in invery *friendly* personation tape stop it coroding again.. see if that kicks the haldex unit back in.( thats my diy bodge job mind kikin In)
If not garage job mate and see you Can get away with jus replacing earth cable instead whole unit
Or anything else expensve 
Cheers mate, fingers crossed! Going to give it a go saturday and see what happens, ill post on weekend with either good or bad news
