Starting/Charging issues (long)

Replace it with a volt meter? Is that easy? Eliiminate connectors and run a straight wire? Is that easy?

I have looked at those articles, but electical stuff kinda scares me, dont really know much about it and dont want to end up frying stuff. I usually just replace the whole thing instead of doing the solder and splice thing, I am a electical scardycat.

Checking stuff with a volt meter doesnt mean much to me, i see the reading , but dont know what it should be in the first place, and what the lowest good reading would be.

Any one got a website for electical dummies??