04-21-2014, 08:42 AM
Forest, you should be able to disconnect the main batt, red 8-10 guage wire on the alternator. If you want to switch it run it through a relay.
Love old school
1976 Newell 8.3 cummins allison 6spd
1977 Newell 8.3 cummins allison 6spd