So you don't leave the first page.........
Lectricity is my weak point, but I ain't not got sperience with the fusible link, or lack thereof. My symptoms were a bit different, but the cars went a bit 'cookoo'. Pry open the plastic case and see if its broken/cracked etc. Mine had a hairline crack under on of the bolts. Cheap to check and cheap to fix.
here is where is sits on my 91 (M50) 525.
Good luck as always,
Dave