Electrical Question - Please Help

[drock608]

The volt meter on my car is slowly going further and further into the red while my car is turned on. With the key in the ignition and the "accessory on" is selected, the battery shows it is decently charged battery but, once the car turns on it goes down into the red and is going more and more dead. I'm assuming this is an alternator problem but i would like a more knowledgeable person to support my theory so i dont go waste 200 bucks. thanks a lot

98 camaro z28 a4

[2001NBMZ28]

Bring the battery to your local parts store and have it load tested first - they'll check it for free. If nothing else it'll eliminate it as being the problem. If it is the alt won't take long before battery goes completely dead.