PaulRainbow
Well-known member
when you highlighted my original post, you conveniently omitted highlighting the word “technically”
you might not need to change anything, depending on the modifications. A non insulated alternator or starter might make the connection between case and existing return cable.
in post #27 you said "My Volvos have isolated earth senders, starters and I dare say the original alternators were. "
Are you saying that you have changed the alternators for non isolated return versions and that they work ok ?