Cadillac 2004 DeVille - Manual (Page 174)

Charging System Light
When you turn the key to
ON or START, this light
will come on briefly
to show that the generator
and battery charging
systems are working
properly.
If this light stays on, you need service and you should
take your vehicle to the dealer at once. To save
your battery until you get there, turn off all accessories.
Brake System Warning and Parking
Brake Indicator Light
Your vehicle’s hydraulic brake system is divided into two
parts. If one part is not working, the other part can
still work and stop you. For good braking, though, you
need both parts working well.
If the warning light comes on, there is a brake problem.
Have your brake system inspected right away.
This light should come on
briefly when you turn the
ignition key to ON. If it
does not come on
then, have it fixed so it will
be ready to warn you if
there is a problem.
3-48