2001 Dodge Ram Van 3500 will not start

As Pete Peters and Oblivion mentioned what you are acually doing is backfeeding power that should come from the ASD relay. Not only does it supply power to the Secondary O2 Sensor relay but also to the injectors. So either the ASD relay contacts are bad, the control to the relay isn’t working or, fuse 11 in the panel under the hood is blown.