65 Valiant now gauges go full when ignition key turned or running

With 5 limiters, I would hope 1 would be good! The RTE's and the originals behave the same way, with the pulsed 12 v output. Hard to see with any accuracy on a digital meter; the sample rates just does not match the pulse rate of the limiter. My Fluke meter shows over 10 volts on occasion, but misses most voltage pulses. An analog meter shows every pulse but not to full scale since it is too slow to respond. My old Tripplite shows every pulse but only to a peak of 6.5 volts on a 12v full scale setting; it is too slow to show the full pulse voltage.

The limiter on my original '62 pulses about 2x per second with the key set to RUN but the engine not running.