This won't solve your bulb out indicator, but I do have a solution to the flickering in your license plate lamps:

These lamps flicker and die for two reasons: 1. Many of the LEDs that fit this position are not sealed and the connections on the inside rust and short. 2. The Crossfire was never meant to use LED lighting; the wiring produces overvoltages that while safe for standard lamps are disasterous for small LEDs.

Here are the workarounds:
1. Get this type of LED instead what you have installed now: search eBay for "6418 White LED" and look for one of the models that is in an all metal housing with two white LEDs. You'll need to place a piece of clear packaging tape across the two LEDs to seal the only holes on the unit.
2. Buy this voltage regulator and install it in between the lamp and the battery (or if you're using load resistors, in between those and the lamp): http://theledlight.com/rg12regulator.html