Okay so I was driving my girlfriend home tonight, I was about 5 minutes into driving and my headlights dimmed very slightly. I'm wondering if this is something I need to get checked out because it dims my interior dash lights as well. It doesn't dim enough to inhibit sight, but I'm still worried that it could be a sign of something more serious. Oh and this has been doing this every since I bought the car ( about a year or so ago? ). Would it really be necessary to have this checked out or just continue on not worrying about it?

 

does it coincide with something else coming on. like the radiator fan?

 

Not that I can think of, but how would I know if the radiator fan came on while I was driving? Oh and I forgot to mention it only dims for 1 - 2 seconds.

 

im thinking the fans are coming on and it takes a second for the charging system to compensate. i dont think its anything to worry about. maybe keep an eye on the volt meter for a while just in case.

 

Alright, thanks!

 

That's what I'm thinking too. Another thing is if you had your interior heat on the defrost mode, that cycles your A/C unit on and off to dehumidify the air. The A/C going on causes a little dip in the engine rpm's, which can momentarily affect the charging output. Or, if you have your rear window defroster on, that really causes a power draw.