Buick RIVIERA 1993 Manual page 114

Anti-Lock Brake System Warning Light
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If the light stays on or comes on when you're driving,
stop as soon as possible and turn the key off. Then start
With anti-lock, this light the engine to reset
the system. If the light still stays on,
will go on when you start
or comes on again while you're driving, your Buick
your engine and may stay
needs service. Unless the regular brake system' warning
on for several seconds or
light is also on, you will still have brakes, but not
so.
anti-lock brakes. If the regular brake system warning
light is also on, see "Brake System Warning Light"
earlier in this part.
The anti-lock brake system warning light may also come
on when you are driving with a compact spare tire. If
this happens, the light means you won't have anti-lock
until you replace the compact spare, with a full-size tire.
If the warning light stays on after you replace the
compact spare with a full-si.ze tire, or if it comes on
again when you're driving, your Buick needs service.
That's normal. If the light doesn't come on, have it fixed
so
it
will be ready to warn you if there is a problem.
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