Daytime Running Lamps System -- Excursion & F250-F550 Super Duty

• Specifications
  • Torque Specifications
• Description And Operation
  • Daytime Running Lamps (DRL)
• Diagnosis And Testing
  • Daytime Running Lamps (DRL)
    • Notes
    • Special Tool(s)
    • Principles of Operation
    • Inspection and Verification
    • Symptom chart
    • Pinpoint Tests
      • Pinpoint Test A: The Daytime Running Lamps Are Inoperative
      • Pinpoint Test B: The Daytime Running Lamps Are On With The Parking Brake Set
      • Pinpoint Test C: The Daytime Running Lamps Are On With The Ignition Switch Off