Instrument Help ?

Hi all,

I have a 87mdl 911 with may be 92-94mdl(not sure)instruments in it,the problem is the revcounter has a little LCD in it that displays i think speed,mileage and some other stuff butt i cant get it to work right,the thing just reads 31mph all the time.
Iam not even sure how to move bewteen the differnt functions,so this may be all i need to know every thing looks to conected ok so any help would be good.

Thanks
Mark T

This is just a guess, but I think those indicators run off of the DME sensors at the flywheel. In order to get everything working (updated), it would probably be very cost prohibitive! If I were you, I would try to sell or trade it for a proper gauge with the casis shift light. just my $.02

-EJ