The 1994 Honda Magna VF750C Charging System consists of battery, main fuse 30A, regulator/rectifier, and alternator. The battery can be damaged if over charged or undercharged, or if left to discharge for long periods. The battery voltage may be recover after battery charging. Provided the circuit on the wire harness side is normal and there are no loose connections at the connectors, inspect the regulator/rectifier unit by measuring the resistance between terminals.
Below schematic illustrates the 1994 Honda Magna VF750C Alternator and Charging System Circuit and Wiring Diagram.