Camaro95 3.4L V6 electrical problems

:banghead:
Hi all,
I faced the following situation:
Start my car- take a 2 miles ride to the mall and when I got back in the
car the battery (fresh installed) was dead (4V) !!!!
The only electrical thing I set my hands on was a few months ago when I installed an after market radio-CD replacing the factory's one.
Any ideas where is the short-circuit problem ?
xjohn69

sounds like a charging system problem, check your alternator output
http://files.automotiveforums.com/gallery/watermark.php?file=/500/209056mycar.jpg

alternator...

if it never did this before you installed the radio, then thats where the problem is. if you dont know alot about electrical systems, i suggest taking it to the dealership and having them run a parasitic draw test on it, and isolate the circuit for you that has the excess draw that killed your battery. in wiring your radio, you probly accidentally spliced into a wire that is keeping a module or something awake, and its killing the battery.