Well, I made a newbie mistake and reversed the polarity when trying to run the lights on a 6 volt (4 AAs) input for just the lights. Shorted one of them out I believe. Both the battery pack and the lights came with female connectors, I made up a short wire jumper to plug into these for the test but didn't notice the all black double wires out of the switch on the power pack were twisted inside the switch. So now I'm down to one working flashing/rotating light, (and it might also be suspect now). But it seems to be acting like originally where it 'rotates' the 5 led flashes until the steering servo is activated, at which point it locks up. I think I will order one replacement yellow light and a male to male jumper for the battery box and proceed from there. These are cheap China items and anything could be going on. Hopefully, separating them from the truck's internal systems (ESC, receiver) should reduce the variables.Today I am changing to a new 4 channel receiver and 4 channel radio. Might plug in the one working light to see if it changes anything.