Originally Posted by Ostinato
Unfortunately the rectifier is completely isolated from the alternator
body so that suggestion will not work.
I'd have been more than a bit surprised if it wasn't an insulated return
There's nothing wrong with mounting an insulated
bus bar on the alternator or on the engine
for all the earths (sorry, negatives
) as some suggested.
I had a truck years ago with an extra steel
bracket fixed to the rear lower alternator mounting for the same reason. 5mm plate and a hole with a rubber grommet for the cable. That'd work too.
Any of the suggestions that shift the vibration to somewhere else and maintain the insulation
will work just fine. I'd have used a cable tie but then I'm very, very lazy...