You might consider taking your battery to the parts store for a load test just to rule that out. I had a relatively new battery act this way, had to get it replaced under warranty. It wasn't flat-out bad, but it was "marginal" - wouldn't hold a charge as long or as strong as it should, but wasn't so weak that it couldn't crank the car after a charge.
check Time to check the turn signal switch, HL switch, ect. That turn signal switch can cause a ton of problems...
What is there to check? The turn signals work fine. I just went and put 45 miles on the car, and was not able to replicate the problem.. Before starting the car, with it just sitting there in the driveway, I had 13.01 volts at the battery. At idle, with nothing else turned on, I had 14.01. At 1,000 RPM, I had 14.05. At 2,000 RPM, I had 14.15. At 3,000, 14.20. Took to the road with the volt meter. Just driving around town, with everything on, the voltage fluctuated in the 13.70's - 13.80's. Got on the interstate. At 65 mph (2,500 RPM), I had 14.08 volts, that is with every energy consuming thing in the car turned on. At 70 mph (2,650 RPM), I had 14.14 volts. At 80 mph (3,000 RPM), it fluctuated between 14.18 - 14.22. I ran 75-80 mph for about 5 miles. Like I said, I drove for quite a while and was not able to replicate the problem. Radio worked fine, all lights stayed nice and bright. I'm going to drive the car back to NC this weekend, a little over 200 miles round trip. I'll have the volt meter hooked up in case the problem returns...
