See also:

Lamp assembly condensation
Exterior lamps are vented to accommodate normal changes in pressure. Condensation can be a natural by-product of this design. When moist air enters the lamp assembly through the vents, there is a p ...

Signal indicator mirrors (if equipped)
When the turn signal is activated, the outer portion of the appropriate mirror housing will blink. This provides an additional warning to other drivers that your vehicle is about to turn. ...

Replacing exterior bulbs
Check the operation of all the bulbs frequently. ...