Electrical?

I have a 2005 Chrysler Sebring Convertible, started out with airbag light comin on for a few days and then goin out a few days later. Then it started blowing fuses for my cigarette lighter, then the cd player would occassionally stop playin for a min and start again, and just the other day, went to start the car up , it started, then died and had to be jumped. Last nite, I am drivin on interstate and the car just dies! Lights go out, engine stops running, and steering was tough to get over to side of road. My bf jiggled some wires around battery box and after about 4 times of it coming on, it finally stayed on and ran.
Had my battery ckd at advance, they said it was ok, but couldnt get a reading on altenator.
I am confused on where to start, other than look for loose wiring, and I am ASSUMING I have an electrical problem, any advice?