electrical problem, no power

Hello,

Have a 95 Mustang GT. Figure my problem is pretty generic. The battery idiot light's on. Without jumpers the car won't start...totally dead...no lights, clicks nothing. Will start with a jump but once I add any load...lights, brake pedal, the car quits.
Alternator or battery?

Thanks

Sounds like both to me. Take the battery and the alt to autozone. Have them test them, you will probably need a battery and an alt.