Honda Prelude 1990 Online Reference Owner's Manual page 24

Warning and indicator Lights (cont'd)
ANTI
Anti Lock Brake Warning Light (Si with ALB)
LOCK
The ALB (Anti Lock Brake) warning light will come on, and remain
on, if there is a malfunction in the ALB system or when the ignition
switch is turned on with the engine not running, if the light comes
on while driving, stop the car at a safe place and shut off the engine,
if the light does not go out or lights again while driving, have the
system checked by an authorized Honda dealer as soon as possible.
NOTE:
The light does not indicate a failure of the normal brake system.
The light only indicates a malfunction in the ALB system. In such a
case, the ALB system is automatically shut down but normal
braking capability continues.
After jump-starting the car, there is a possibility that the ALB
warning light may come on due to insufficient battery voltage.
After the battery is sufficiently recharged and the engine is turned
off and restarted, the ALB warning light should indicate that the
ALB system is OK, by coming on for a few seconds each time the
engine is started. If the light remains on after recharging, have it
checked by a Honda dealer.