I recently swapped out my engine and instrument cluster (standard to 1990 SR5 cluster). I just noticed that the dash lights that illuminate the environmental controls do not work. It is just one light bulb that reflects through plastic. AC, instument cluster, etc lights and everything else works.
It can't be a fuse or lots of things would be out. It should not be the bulb because it went out when I replaced the instrument cluster. My thought is that this little light gets power through the instrument cluster and this cluster does not provide it because it is designed for a different year.
TIA AG2