Thought I would share my experience in case someone else has the same issue.
My tachometer was working but wouldn't move past 2000 rpms and the blue bright light indicator was on while my lights were on low beam.
I went to drive it for the first time in the dark and noticed there was no backlighting on the tachometer.
Turned out to be a missing ground on the tachometer.
Now tach, high/low beam indicators and back lighting work like a charm.
John