what's up all!

when cruzing down the road at night, I notice my head lights amount of glow will vary relative to the RPM of the engine. higher RPM/brighter light...Lower RPM/dimmer light. Also the check engine light and one other light(I can't remember) on the dash will bairly glow. these don't come on, but sort of bairly shine the same way my headlights do relative to the engine RPMs. I only notice these at night though as I probably just can't see them during the day. Anyway, my question is...Is this a sign of a failing alternator? If not, any ideas on what it might be? I just replaced all the belts and have them super tight to prevent any squealing, which they don't do. So I don't think the belt is slipping or anything.....besides, I noticed the dash light thing before I replaced the belts. Thanks for any input.

Could be an alt or the battery is starting to get weak. I know had similar dimming with my truck right before I changed the battery.

Try putting a charger on your battery and see if it will take a full charge. Mine would not so I got a 1000 CCA battery and now everything stays bright all the time and I can run the radio at tailgate partyÆs all day get in it and it starts right up.

Thats it. Take it to the Zone,Advance,Pep Boys etc.. They can hook to it and tell you what it is,.. or isn't. It's free, and can give you peace of mind.