For those of us with Digifant engines, it is nice to Clean injectors when the occasion arises, but with the injector it is electrical, so you need a way to energize them.
Take a Injector connector from the Junk yard next time you visit.
Extend the wires and attach them to a 9v DC battery, polarity don't matter.
Clip it to the injector, and you should hear it "pick".
Now you have a power source that can attach itself to the injector, so that you can "pick it" and spray your favorite cleaner through the "opened" injector.