I thought it was the alt, but something I forget to say is that I checked the voltage at the battery, 12.2V with engine off, and 14.2V with engine on at idle.

I also noticed that it is RPM sensitive. At about 2K the lights (both voltage & brake) will start to flicker, and around 2.6K they are on constant. If it was the alt, why does the brake light come on? I was thinking maybe the voltage reg is going out, and over driving (V too high) at the higher RPMs.

Is this possible??? I will have to get my wife to rev the engine while I am looking at the voltage.