Depends on which issue you are referring to.
the MOST COMMON high-rpm light is from floating brushes on the alternator, a sign of an aging alternator.
Solving involves either rebuilding the brushes (technically do-able, but not worth it to me...) or replacing the alternator.
There is another issue, which is fixed by GoldenTour's wire fix...
Is there a third issue that is actually a verified "third" issue?