Try doing the same while stepping on the brakes. The ECU signals the
alternator to lower the voltage when you are idling with a warmed-up
engine (plus another few requirement). Stepping on the brakes puts the
voltage back to normal.

Both the sunroof and power windows draw a lot of current, particularly
at start-up, so some dimming of lights when the alternator is in
power-save mode is not unexpected.

Integra LS wrote:
>
> Hey Guys,
>
> Anyone have any idea what would cause my car's lights to dim and
> flicker for a split second while rolling my power windows and sunroof
> ? The interior lights on the guages and the outside headlights flicker
> for just a second but it's noticable. I couldn't get it to do it while
> the car is moving, it only happened when the car was in park or not
> moving. The car is a 98 Acura Integra LS w/AUTOMATIC tranny with 75K
> miles. The battery was replaced last year with a new one from Walmart.
>
> Could this be warning sign of an alternator about to give or something
> more serious ? I hope everyone can provide some help and insight on
> this. The car does start fine and runs well. Thanks for any help this
> group can provide.