Wat cause stalls and rough idle like it wants to die

I believe it is my altanatetor because the lights dim out to

Read the first answer!

I did read the first answer. What I am wanting to know is how his problem was actually fixed. I've been to shops. I'm tired of ignorant people throwing parts at my truck at my expence. This is why I'm attempting to fix this problem myself. Thanks for your input but I found it more annoying then helpful.

That should be more annoying *THAN* helpful!! .. So THEN you just decided to throw parts at it yourself, OK...that's what you should do! .. Bye Bye...