Electrovalves removed

1981 308 GTSI us version, After removing the electrical part of the 3 electrovalves (vacuum components removed prior), it started causing havoc with the ignition, cold start up light not working ,alternator light on and running real bad. I plugged the electric connections back on the electrovalves and the car ran great (no vacuum connected). I just wanted to remove them being they weren't controlling anything. After looking at the wiring diagram I don't understand how removing them would effect the digiplex like that. Need help understanding that circuit.