Hi Stan
It can get really confusing very fast. The victim for the Knight Rider is a Hotwheels 1:43 scale car. I can not open the hood, I was thinking of putting the led lights under the car in the front. The Chinese waterfall will not fit under the car. See attached photos. From Rtr12 circuit it stated need a 9 volts DC but you say I use 5 VDC I will try it out and see if it works. It make sense to use less wiring with sound engineering.