First things first. You dont have any backup lights either? The 3 bare wires under the truck need to be fixed. You can get a replacement connector from Dodge #2926502...thay are not cheap($20). you might be able to find one at NAPA or CarQuest, I'm not sure. Or maybe a tranny shop? Your relay must have a reliable ground and the 3 wire harness provides this and the backup light function. You may need an assistant to work the start key while you feel the relay when your truck wont start. It must click in the start position. Also since I now know the 3 wires are not connected it will make no difference if you try to start in neutral. You could have other problems also but you need to fix the wiring problem you have alrerady.