Time to kleen the bulkhead connectors..

Unsnap each, wire brush the connectors and apply dia-electric grease. Replace any terminal that is damaged, replacements available from Napa.

Keep in mind...
The electrical systems in our ole Mopars was designed to handle a max of about 40 Amps..

If one has added electric fans, fuel pump, subwoofer amplifier the system need to be beefed up.

Just my $0.02...