I recently began having a problem with my car's electrical system. The thing that red flagged it to me was that my amp (powering my sub) would only power on with the car off, but when I turn the car on, the amp goes into protect mode. It had been hooked up the way it was for a long time with no issue so I knew it wasn't a wiring issue, although I checked anyways. No luck. I bought a new battery, thinking maybe the old one was just fried, I mean it was 7 years old so it was probably on its way out anyways. Same problem. I grabbed my handy-dandy multimeter (should have done this first) and found that my electrical system is pushing 16.3 volts when the car is running! So I want to replace my voltage regulator now. Is there any way to replace this by itself, or will I have to put a whole new alternator in?