Have some Lights, but not others, Help!

Without being there, hard to guess. But you are allowing a "non standard" situation screw with you. In other words the cluster MUST be grounded, so you have created a "false" situation which (for whatever reason) caused the lamps to light. You are leading yourself down a wrong path. Ground the thing, check voltage to the affected lamps, and if that is OK, then deal with the lamps. "I bet" the lamps are reversed. If you can't do anything else, dig out (or buy) a couple of incandescant lamps to troubleshoot with, then see where you are with the LEDs