Headlights dim when using power-windows.

[Fedowyn]

Pretty much what the title says. whenever I roll my windows up or down when my headlights are on, they dim to about 50% or so, then the moment I let go of the window button they return to normal. Any idea what's going on?

 

[Valet]

Battery and grounds.

 

[RedRyder]

Taxing weak electricals. ^what he said. Also check out the "Big Three" upgrade.