I have a 96 Blazer 4 wheel drive 4 door. A few weeks ago all my lights starting acting a little odd for a few hours but it shortly went away. Well now it is back again, when i turn on my right Blinker, on all my dash lights blink with it. (Gear Selector light, Radio lights, Temp gauge lights) And when i push my break all my lights dim (the ones listed above). Also when i hit my breaks my Blinkers stop blinking and just hold on.

I have a new optima battery.

Going to record a video of it later on and see if whats going on outside matches with whats going on inside.