Car was having to be jumped often with 11.4v on battery. Battery was a few years old so I went ahead and replaced the battery first. Idle is a little low and even in park with a little acceleration the radio will cut out and p/s will turn off and VSC Trac light comes on until you let off the gas. Am I right in thinking it's just the alternator not supplying enough volts and turning electronics off?

 

Put a voltmeter to the terminals and test what the cars voltage is at idle

 

When I initially jumped it it was at 13.6-8 volts than idle started dropping and after about 5 minutes it was around 12.6 volts. Pulled the alternator fuse while running to see if there would be a significant drop and I'd just stayed the same 12.6-8v. Tried pulling fuses on other systems like dome,radio etc and nothing changed. I'm leaning toward the alternator, just not being a big electrical guy I wanted to make sure I went about it the right way.

 

You need a new alternator, throw in a denso brand or a remanufactured denso