Fading instrument cluster lights
 

I lost the lights for the radio and shift panel, they worked intermittently for a while then went dead. Pulled the instrument console and cleaned the contacts. Got the radio and shifter lights back but now have faded or non exist ant mileage and time lights. When I turn on the head lights these 2 lights become brighter ( usually). Seems like maybe a poor ground somewhere.
Any suggestions where to go from here?