Cadillac 2003 CTS Owner's Manual page 119

If the windshield wipers are in use for approximately
six seconds while you are driving, the exterior lamps
will come on automatically if the exterior lamp control
-
is in AUTO. See "Wiper Activated Headlamps" listed
previously for more information.
Be sure to clear ice and snow from the wiper blades
before using them. If they're frozen to the windshield,
gently loosen or thaw them. If the blades do become
damaged, install new blades or blade inserts. For more
information, see "Wiper Blade Replacement" in
the Index.
Heavy snow or ice can overload the wiper motor. A
circuit breaker will stop the motor until it cools down.
Clear away snow or ice to prevent an overload.
Headlamp Washers (If Equipped)
If your vehicle has the optional high
(HID) headlamps, your vehicle will also have headlamp
washers. The headlamp washers clear the headlamp
lenses so that you can get the maximum visibility and
brightness from your headlamps.
The headlamps must be on in order to be washed. If the
headlamps are off, only the windshield will be washed
when the washer button is pressed.
To wash the headlamps, press the washer button located
at the end of the windshield wiper lever. Both the
headlamps and the windshield will be washed.
See "Windshield Washer" following for more information.
-
intensity discharge
The headlamp washers are
located on the inboard side
of the headlamp lenses.
2-51