u/Arecu4041

I have a 1994 sierra i just recently bought, guy told me i just have to wire the alternator in and I cannot figure it out.
Would this be the right bulb to use for the dummy light?
I’m getting 12 volts when I use my volt meter so the alternator is not charging. I’m not sure if it’s getting excited to charge. Any help would be appreciated.
I have gotten frustrated and started over many times to the same result no charge.