Hyundai Repair: losing power, alternator belt, jumper cables

Question
1999 sonata  firstly bought this vehicle in Dec 09  service engine light on and off   now on   but no issues  Had it tested... recently while driving the alternator/baterry ignition lights (red) come on....    they sometimes went off.

recently on all time and was running out of power and staleld.  thoguth battery   as it has been cold here.  got boost   and started but failed in a block...  waited some tiem  then boosted   no red lights and drove for a few minutes  then died.. had alternator checked   replaced battery  and lights off   had checked out...no issues    then soon after lights on again (red  ones) and stalled  lose of power  not even able to turn over...  is it MAF sensor wiring?  maybe exoposed wires under dash (ignition area)?
diods in alternator?
ECU fuse?
idle actuator?
battery ground wire?

help???/

Answer
The battery lamp in your cluster is controlled by the alternator.  If it comes on, the alternator isn't charging.  Presuming the alternator belt is properly in place, replace the alternator.

Also, check the main fuse (about 80A or so).  It'll either be in the main underhood fuse box or in a small one by the positive battery cable.  Attaching jumper cables with incorrect polarity will cause this fuse to blow.