If your car Battery is dead you may have a bad alternator! Some of the symptoms of a bad alternator are,

Your lights are going dim while driving.
The radio shuts off when driving.
Your cars gauges stop working.
Your heater stops working,.
Your cars battery keeps going dead.
Your car will not start/no crank.

If you are having any of these symptoms you may have a bad alternator and you should watch this video in detail to determine if your alternator is bad!

Helpful tools:
Great Voltmeter http://amzn.to/2gQ6uR3
Great Test Light http://amzn.to/2z6vDB6

My other YouTube Chanel    / doityourselfbri