Problem with reverse glow gauges

[1997BoostedDSM]

So i have the Euro Reverse Glow Gauges (Blue) on my 1997 Eclipse, and they don't light up anymore. They used to, then they slowly took longer and longer to warm up before coming on, then one day they just went out altogether. Any tips? I've checked the fuses, all seem to be fine. There is a Faze 3" little square thing for my air fuel ratio/boost gauges, but I don't see any wires or anything for my display.

 

[Deadpool]

Start by grabbing a test light and work your way from your gauges back to the power source. When you hit live power you know where your problem starts.

 

[motozachl]

The reverse gauges usually have a adjustment knob to adjust how bright they are, try and find this to adjust or bypass