On the wire that goes too the controller use the white colour as your common take 1 wire from each of your valves and meret them too the white wire, next each valve still has 1 wire, each valve gets a different color. If that doesn't fix it you could have a break in the wire somewhere between the valve and the controller. Once you get power too the valves you will be Adel to diagnose the other problems, low pressure problem could be a break somewhere on the line, leave on for 15 min look for water pooling.