An Electrical Nightmare

Hey everyone... I have an electrical issue (what else is new right?!). Besides the point to getting a new battery now, I charged up the battery and cranked the car over. When it starts the amp meter fluctuates between -10 and -15. When I open a door it will drop to -20. With the car idling I can not even hear the horn... All light are extremely dim. Now lets have some fun (car running, door open, and put on a turn signal) -30.

Underneath the dash, is a nightmare of disconnected wires, broken wires, and some wazzoo splicing job some dumb kid (me) did! Well at least I soldered it!!!

On top of it, About 15 years ago I think I screwed up the electronic ignition wiring... For some reason I have three ballast resistors (1 for windshield wiper, 1 for the MP electronic ignition I put in, and 1 to the voltage regulator).

Any input on where to even begin would be greatly appreciated!