Whenever strange lighting issues pop up, I would start looking for a bad, loose, or corroded grounds. I would remove the ground bolt, use some sand paper to clean the connection and the bolt/washer, then tighten back down.
The spooner link I posted in the online manuals thread in the DIY section has a 93 shop manual that is for UK cars. It should give you a general idea of where the grounds are located. It may or may not be identical to the US accord. I would think that the ones in the cabin under the dash and in the trunk would be possible culprits.
It is possible that a wire is grounded somewhere near the gauge assembly that would cause this to happen too.
2005 Acura TSX MT