D3 Check For Burned-Out Rear Brake Lights

- Press on brake pedal while observing rear brake lights.

- Do the brake lights function properly?

YES -- Go to D4. [1][2]D4 - Check For Loss of Brake Input to Antilock Control Unit

NO -- Repair brake light system: Burned-out bulbs or open Circuit 511 (LG). Repeat System Pre-Check. Initial Inspection and Diagnostic Overview