All the lights are flickering

[Moparbandit]

So its a known fact that most mopars have charging system problems and an abundance of bad grounds and such. That being said where is a good place to start when all the lights in the vehical flicker at an idle or when the turnsignals are on, and brighten and dim depending on where yhour foot is on the throttle... ive already replaced the front engine and light harnesses sooo whats next... oh and it has a promaster alternator on it

you guys have been great so far thanks for all the help