okay.....

so my 1998 Tacoma prerunner will krank..... but as soon as the jump boxxx goes off, my truck dies. i just put a brand new battery n it and changed the alternator plug, should i just get a new alternator? ijs, I'm really tired of wasting my time and money.

 

Maybe figure out the problem . Get some local help ask in your local forum.

Break out the Multi meter and get some real world numbers .

When you installed the battery did you inspect and clean the battery terminals.

Without real world voltage anything would just be a guess.

Are you fully charging the battery with a charger before starting attempts ?

If your System voltage drops to low the ECM will Shut the engine off.

Good luck.

 

Think you need an alternator

 

So a couple of things you can do if you want to OP, sounds like you may not want too though. Your call of course.

If you have a multimeter, do this -
https://youtu.be/Bzz7P3qNHcE


If you don't have a multimeter and don't want to spend any money at all, you can try this (I'd use the multimeter) -
https://youtu.be/g2JfpiAeAu8


Should also check for a parasitic draw which could be killing your battery -
https://youtu.be/zdIKNnwEjIs


Good luck.