You seriously do not want to start doing that unless you can follow the wiring diagrams in the back of your Haynes manual. Even then, it's a tough job, because even if you are successful you are...
What do you mean by no power, lack of acceleration, or like battery power and voltage. lol puts you might also check your cadalitic converter mine was doing the same this and that's what it was
This is fairly easy... however: DISCONNECT NEGATIVE TERMINAL FIRST!!
Make sure your car is off Keep your oem head unit codes handy in case you need to reset it Disconnect you're negative terminal...