Tach & boost led both red lite on start?

[GN GURU]

Tach & boost led both red lite on start? They both shoot across the dash but motor runs normal as soon as I turn the key they shoot across & stay across help PlZ thanks

 

[GNVenom]

http://www.installationinstructions.com/FYI/tachboost.pdf

Common failure that can be repaired.