e30mpower,
did you have problem before th etech fiddling around during AE install?

I wonder if the tech open up the light switch (the one with dimming dial). I did, when I was looking for park light line to tap; the black wire in there is it for park light so I wonder if this was spliced and making poor contact (intermittent result on cluster).
Else I have no clue why your cluster is doing that.