2008 Jeep Wrangler Owner's Manual - Page 209

208 UNDERSTANDING YOUR INSTRUMENT PANEL off, it indicates a possible brake system fluid leak or low pressure level, see your authorized dealer immediately. If the parking brake is applied and the vehicle is in motion, the Brake Warning Light will "flash" and a chime will sound. The operation of the Brake Warning Light can be checked by turning the ignition switch from the OFF position to the ON position. The light should illuminate for approximately two seconds. The light should then turn off unless the parking brake is applied or a brake fault is detected. If the light does not illuminate, have the light inspected by an authorized dealer. 12. Anti-Lock (ABS) Warning Light After the ignition is turned on, this light illuminates to indicate function check at vehicle start-up. If the light remains on after start-up or comes on and stays on at road speeds, it may indicate that the ABS has detected a malfunction or has become inoperative. The system reverts to standard non-anti-lock brakes. If both the Brake Warning Light and the ABS Warning Light are on, see your authorized dealer immediately. Refer to "Anti-Lock Brake System" in Section 5 of this manual. 13. Airbag Warning Light This indicator lights and remains lit for six to eight seconds when the ignition is first turned on. If the light does not come on for six to eight seconds, stays on or comes on while driving, have the airbag system checked by an authorized dealer. 14. Rear Axle Lock Indicator Light - If Equipped This light indicates when the rear axle lock has been activated.