Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Section 621 (Exterior Lighting - Diagnosis And Testing, General Procedures, Removal And Installation)
2021 Ford Edge SE, 4WDSECTION Section 621 (Exterior Lighting - Diagnosis And Testing, General Procedures, Removal And Installation)
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnosis And Testing
- Parking, Rear and License Plate Lamps
- Diagnostic Trouble Code (DTC) Chart
- Global Customer Symptom Code (GCSC) Chart
- Symptom Chart(s)
- Pinpoint Tests
- Pinpoint Test A: All Front Parking And, If Equipped, Front Side Fender Marker And Grille Marker Lamps Are Inoperative
- Pinpoint Test B: All Front Parking And, If Equipped, Front Side Fender Marker And Grille Marker Lamps Are Always On
- Pinpoint Test C: An Individual Front Parking Or Side Marker Lamp Is Inoperative - Halogen Headlamps
- Pinpoint Test D: An Individual Front Parking Lamp Is Inoperative - Low Series Led (Light Emitting Diode) Headlamps
- Pinpoint Test E: An Individual Front Parking Lamp Is Inoperative - High Series Led (Light Emitting Diode) Headlamps
- Pinpoint Test F: An Individual Or All Grille Marker Lamps And Front Side Fender Marker Lamps Are Inoperative
- Pinpoint Test G: An Individual Or Both License Plate Lamps Are Inoperative Or Always On
- Pinpoint Test H: An Individual Or Both Exterior Mirror Parking Lamps Are Inoperative Or Always On
- Pinpoint Test I: The High-Mounted STOPLAMP Parking Lamp Is Inoperative Or Always On - Performance Vehicles Only
- Pinpoint Test J: One Or More Rear Parking Lamps Are Inoperative Or Always On
- Reversing Lamps
- Spot Lamps
- Stoplamps
- Trailer Lamps
- Diagnostic Trouble Code (DTC) Chart
- Global Customer Symptom Code (GCSC) Chart
- Symptom Chart
- Pinpoint Tests
- Pinpoint Test A: All The Trailer Lamps Are Inoperative
- Pinpoint Test B: One Or More Trailer Stop/Turn Lamps Are Inoperative Or Always On - Vehicles Not Equipped With A TRM (Trailer Module)
- Pinpoint Test C: One Or More Trailer Stop/Turn Lamps Are Inoperative Or Always On - Vehicles Equipped With A TRM (Trailer Module)
- Pinpoint Test D: The Trailer Parking Lamps Are Inoperative Or Always On
- Pinpoint Test E: The Trailer Reversing Lamps Are Inoperative Or Always On
- Pinpoint Test F: The Trailer Battery Charging Is Inoperative/Does Not Operate Correctly
- Pinpoint Test G: U0100:87
- Pinpoint Test H: U0121:87
- Pinpoint Test I: U0131:87
- Pinpoint Test J: U0140:87
- Pinpoint Test K: U0143:87
- Pinpoint Test L: U0155:87
- Pinpoint Test M: U0415:81, U0415:82, U0415:83, U0423:56
- Pinpoint Test N: P0604:94, U2100:00, U2200:00
- Pinpoint Test O: U1000:00, U3000:49
- Pinpoint Test P: U3003:16
- Pinpoint Test Q: U3003:17
- Turn Signal and Hazard Lamps
- Notes
- Diagnostic Trouble Code (DTC) Chart
- Global Customer Symptom Code (GCSC) Chart
- Symptom Chart(s)
- Pinpoint Tests
- Pinpoint Test A: The Turn Signal Function Is Inoperative Or Always On
- Pinpoint Test B: One Front Turn Signal Lamp Is Inoperative Or Always On
- Pinpoint Test C: One Rear Turn Signal Lamp Is Inoperative Or Always On
- Pinpoint Test D: One Exterior Mirror Lamp Turn Signal Lamp Is Inoperative Or Always On
- Pinpoint Test E: The Hazard Lamp Function Is Inoperative Or Always On
- Pinpoint Test F: The Turn Signal Indicator Flashes Fast When No Turn Signal Lamps Are Inoperative Or Does Not Flash Fast When A Turn Signal Lamp Is Inoperative - Led (Light Emitting Diode) Headlamps Or Rear Lamps
- Pinpoint Test G: B124C:96, B124C:9E
- Parking, Rear and License Plate Lamps
- General Procedures
- Removal And Installation
- Front Fog Lamp
- Front Fog Lamp Bulb
- Front Marker Lamp
- Front Turn Signal Lamp Bulb
- Hazard Flasher Switch
- Headlamp Assembly
- Headlamp Bulb
- Headlamp Control Module (HCM)
- Headlamp Switch
- High Mounted Stoplamp
- Light Emitting Diode (LED) Control Module
- Light Sensor
- Rear Lamp Assembly
- Rear Lamp Bulb
- Spot Lamp Switch
- Trailer Module (TRM)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.