Uneven Brightness Exhibited Between Different Meters
WARNING: This page is about a different car, the 1985 Nissan Maxima and 1985 Nissan 200SX. However, it is still accessible from the selected car via links, so may be relevant.
Readjust brightness with volume in power unit. See Figure . If brightness can be adjusted, power unit is good. If brightness does not change, replace power unit. If brightness can not be equally balanced, replace power unit and display unit.