Here are the symptoms:

-SRS light blinks on and off
-Battery light blinks now and then while driving
-At night lights dim and brighten for everything except the radio. They never cut out, just dim and brighten (almost like shaking).

The battery is being charged for sure because I have driven for over 1000 miles like this and no starting problems ever.

Is it maybe the alternator belt? Loose or something?

 

Im guessing its your belt. That happened to me then a few days later it started to smell like burned electrical parts and my belt broke. Either adjust your alternator and that will work or if it doesn then its your belt