I’m replacing all coolant system components on my 3.0 and I want to pressure test the system before I reinstall the intake. Can I reconnect my battery to run the aux coolant pump so that I can fill the entire system? Or what would be the correct way to do this? All the wiring plugs are disconnected so I don’t want to turn the key to 1 and cause a ton of problems. My valve cover and coils are also out. Any ideas?