4.8is Instrument Cluster *Help*

[ETAction]

Outpost,

I recently installed the Avin Avant 4 system. Its alright, but thats a different story.

The Avant 4, as we know, is plug and play. The only wire that was tapped into was the reverse wire for the backup camera. However, since installing the unit my instrument cluster lights are not working. They illuminate at night with the headlights on and the dimmer works, it is the tachometer light that increases with the engine becoming warmer that is not working as well as the bottom pixel screen and the low fuel light. The bottom pixel screen is extremely faint and can hardly be read at all. Both smaller light panels on either side of the large screen work ie, parking brake light.
The aftermarket amp which is installed was also rewired and the battery disconnected but this should not have affected the cluster. Also, the left side of the headlight Halo is not working now.
Could all of this be related, or just freak weird timing?
Mainly concerned about the instrument cluster not lighting.

An insight would be great.

-ETAction