Yes it can.
To regulate the voltage
you dont, it is a sealed, (rivets) item
Need to replace a voltage regulator, wires connected individually not by male/female connectors, not sure how to reconnect correctly
There is a plate behind the battery and before the fuel tank, where the voltage regulator should be bolted. It is a small, metal rectangular box, with four wires coming from it.
If the wiring checks okay you may have a faulty generator or voltage regulator.
POLARIZING YOUR GENERATORhttp://web.utk.edu/~tprather/FoothillsTractorClub/TechTips/PolarizeGenerator.html
The voltage regulator for a John Deere 4100 compact tractor is located in the engine compartment near the battery. Look for a small black box that looks like it has vents on top.
The 1998 Chevrolet Astro Van voltage regulator is part of the alternator. The voltage regulator cannot be individually changed. You will need to change the entire alternator.
the voltage regulator is located in the voltage regulator compartment
Troubleshoot the voltage regulator
The voltage regulator is integral to the engine computer.The voltage regulator is integral to the engine computer.