2001 Dodge Truck injector

Electrical problem
2001 Dodge Truck V8 Four Wheel Drive Automatic 100.00 miles

this is topic 127360 forum 195 I can not figure out how to get there and ask a questain. But the last awnser I received said to check ground side. So where is it and what am I looking for. As I said earlier I have tested all injectors each one is fine other than # 3 and is getting about a 10th of what the other ones are getting and that is ideled up.