Easiest way to test would be to put power to the wire before installing them in the truck and see if the DRLs come on with nothing else connected. Would obviously need a ground as wellI don't think aftermarket headlights have relays built in for that. That fuse tap is powered to ignition on to provide power for DRL, hence "always on" when key is on.
One way to test is to unplug the fuse tap and go through the whole cycle and see if anything turns on.