I just had my cluster out because I wanted to replace the idiot light and turn signal bulbs with brighter leds...that's when i discovered that the bulbs are soldered in to the circuit board...there are 4 replaceable bulbs in the cluster but they are for instrument back lighting. you can verify a blown bulb by pulling the connector off the temp switch and putting it direct to ground with the ignition switch in the on position...hope this helps
ill check that when i get the chance. if i recall correctly the interstate model, 2000 valkyrie, the light is supposed to turn on for a sec when you start the bike correct? I know the older ones done do this