I really liked the video. I would like to take classes with you. First I would like to know what is the voltage of the current that enters the injection valve on these three wires of the Hino 500

I have a Hino 300. Not starting after sitting for few days. Does the hand pump cause the reason as well?

How to test the current in these three wires which are red, black and white. What is the current 12v, 24v or e but lower than these voltages