Voltage Regulator Testing?

Yes. If you have a variable power supply here is a simple way to bench test. Place a 12V bulb test wires on field terminal of regulator and case ground. Place the + supply lead to ignition terminal of regulator, - to case ground. Start at 12V, the bulb should light, increase voltage to 14.5V, the bulb should go out. By slowly changing the voltage you can determine the operate point.