There was one other member that posted with the same problem. The "switch" is internal to the gauge unit. ($$$) AFAI remember he got his done under his Honda care extended warranty. 
Thats precisely why I did the "Gauge lights peskiness Mod" and posted the how-to on my web pages (see my sig).
HTH!
Thats precisely why I did the "Gauge lights peskiness Mod" and posted the how-to on my web pages (see my sig).
HTH!