I have been losing my alternator battery recharging on my 88 SWB. I went to Auto Zone and when they attached their test device to the battery it indicated that my alternator was putting out less than 12 volts. I returned my rebuilt alternator back to the shop that R&R the unit. and it appears the single wire connection is arcing. Installed a spare alternator on the truck and the same thing is happening again. Alternator man says my fuse link is bad and needs to be replaced. I noticed when I changed the alternator the single wire connector had some rust on it. Any ideas on how to find out what is causing this problem?