1985 Chevy Monte Carlo Temp, Gas, Oil Pressure, Voltage gauges

Electrical problem
1985 Chevy Monte Carlo V8 Two Wheel Drive Automatic

I have a problem with the Temp, Gas, Oil Pressure, Voltage gauges on my 85 monte carlo ss. The gauges do not work. After turning on the car the gauges will not read at all. They all do not respond even a little bit. I have taken off the dash and replaced the gauges but they still are unresponsive. I cannot seem to find the problem. The only time the gauges do work is if the temperature outside is somewhere near freezing.I am compleately stumped as to why but they will come on for a few mins and once the car is warmed up they turn off and will not come back on. Any info on this would help me tremendously. I am not having to calculate the milage to figure out how much gas I have left which is very difficult to remember at all times. Thank You Very Much!