Cadillac DeVille 2005 Owner's Manual page 168

Anti-Lock Brake System
Warning Light
If the light stays on, turn the ignition to OFF. Or, if the
light comes on when you are driving, stop as soon
as possible and turn the ignition off. Then start
the engine again to reset the system. If the light still
stays on, or comes on again while you are driving, your
vehicle needs service. If the regular brake system
warning light is not on, you still have brakes, but you do
not have anti-lock brakes. If the regular brake system
warning light is also on, you do not have anti-lock brakes
and there is a problem with your regular brakes. See
Brake System Warning and Parking Brake Indicator
Light on page 3-47.
The anti-lock brake system warning light should come
on briefly when you turn the ignition key to ON.
If the light does not come on then, have it fixed so it will
be ready to warn you if there is a problem.
3-48
With the anti-lock brake
system, the light(s) will
come on when your engine
is started and may stay
on for several seconds.
That is normal.
Traction Control System (TCS)
Warning Light
United States
This warning light should come on briefly when the
engine is started.
If the warning light does not come on then, have it fixed
so it will be ready to warn you if there is a problem.
If it stays on, or comes on when you are driving, there
may be a problem with your traction control system
and your vehicle may need service. When this warning
light is on, the system will not limit wheel spin. Adjust
your driving accordingly.
Canada (Analog Only)