While driving, the "brake" warning light and battery symbol light on the dash of my '01 legacy wagon lit up. Later, the "ABS" light came on and all the lights in and out of the car began to dim. Even the tach and speedometer needles drop to zero, if the engine is not revving beyond idle. The alternator belt seems snug and unworn. All the lights are dim with the engine off, as well.
I need urgent help, please, as I'm at work now and my subaru is parked out in the lot. I just don't want to get burned by a mechanic, so a little knowledge before I shell out the cash for a tow and repair would be great.