Push to test Button for warning light problem

[Akash408]

Hi.every one I have 4 warning light on Ems ,alternator,canopy,fuel,and Pitot heater.and 03 voltage regulator which convert 24 volt or 28 volt into 12volt DC for warning light.the problem is that when I pressed Push to test button all sensor on Ems page showing cross.any one help me