The mpg window of my gauge cluster keeps going "no bus" which means it's not getting a signal.

Two years ago my son and I took the gauge cluster out and applied some die-electirc grease.

That fixed the problem.

Well this time we did the same thing again because it was popping up again
No Bus...... so we have it apart right now.

Before putting it all back together we tested it. It still says no bus and it won't go away like it did two years ago.

I have been using the GPS for my speed and my overhead fuel gauge for my gas level.

Any thoughts, the gauge cluster is out at the moment as we speak.