2002 Ford F150 Owner Guide 4th Printing - Page 12

Instrument Cluster Check fuel cap Illuminates when the fuel cap is not installed correctly. Check the fuel cap for proper installation. When the fuel filler cap is properly re-installed, the light(s) will turn off after a period of normal driving. Continuing to operate the vehicle with the check fuel cap light on, or a mis-installed fuel cap can activate the Service Engine Soon/Check Engine warning light. It may take a long period of time for the system to detect an improperly installed fuel filler cap. For more information, refer to Fuel filler cap in the Maintenance and specifications chapter. Brake system warning To confirm the brake system warning light is functional, it will momentarily illuminate when the ignition is turned to the ON position (alternatively for some vehicles when the ignition is moved from the ON position to START position, the light will momentarily illuminate prior to reaching the START position). It also illuminates if the parking brake is engaged. If the brake system warning light does not illuminate as described, seek service immediately. Illumination after the parking brake is released indicates low brake fluid level or a brake system malfunction and the brake system should be serviced immediately by a qualified technician. Refer to Brakes in the Driving chapter for more information. Anti-lock brake system (ABS) To confirm the anti-lock brake system (ABS) warning light is ABS functional it will momentarily illuminate when the ignition is turned to the ON position (alternatively for some vehicles when the ignition is moved from the ON position to the START position, the light will momentarily illuminate just prior to reaching the START position). If the light remains on, continues to flash or fails to illuminate, have the ABS serviced immediately. If the ABS light remains on, it means the anti-lock brake system has 12