I noticed that when I cut the wheel hard my car stalls and radio cuts out. Then this started happening when I suddenly turn my head lights on or flick the high beams. The car dies briefly then starts right back up.

I am thinking battery, alternator, or corroded wires from battery terminals. I don't what to just throw a part at this and find out I was wrong.

Any ideas on what the culprit could be or any definitive tests I could perform?

 

Does your stereo system look like this? J/K

 

Check all the above.

 

Have the battery tested and check the connections. Classic symptom of not enough amperage under load.

 

Did you ever find out what the problem was?