Okay folks any help would be greatly appreciated. I bought the cigarette lighter voltage gauge and it shows as follows: steady engine rpm gauge reads 14.2-14.8 volts. Revving engine (moving or in park) gauge momentarily reads 12.5-13.0 volts. Revving would be 1,000rpm to 4,000rpm quickly. These gauge readings seem to be more erratic when actually moving. When in park revving engine voltage fluctuations not as constant. Also when I experience the voltage drop, idiot light comes on and lights flicker momentarily. Alternator has been replaced, battery replaced, belt replaced, belt dressing applied. Any ideas folks. Clearly there is truly a voltage drop when idiot light comes on, but only when engine is revved or accelerated. At constant engine rpm or idle voltage very very consistent in the upper 14volt range