OK so its raining... and I decided to try and daisy chain the two lights using extension cords... with these lights its a viable way of doing it... and I have checked the wiring I created with a multimeter... theres no short across the pairs... but when I plug the two male ends into the lights... and cross the pairs I cannot get the two lights to both flash...

Any ideas?

I am using two HH 2-prong cables spliced at the female end so that one PC-HH adaptor or a light sensitive adaptor should close the ckt and pop both flashes...