Parking, Rear and License Plate Lamps — 2016 workshop reference 5662

Positive Lead	Measurement / Action	Negative Lead
C1127-2		Ground

Is the voltage greater than 11 volts?

Yes	INSTALL a new front parking lamp (turn signal) bulb or front side marker lamp bulb for the shorted bulb. REFER to: Front Turn Signal Lamp Bulb (417-01 Exterior Lighting, Removal and Installation). REFER to: Parking Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).
No	GO to A4

Yes

INSTALL a new front parking lamp (turn signal) bulb or front side marker lamp bulb for the shorted bulb.

REFER to: Front Turn Signal Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).

REFER to: Parking Lamp Bulb (417-01 Exterior Lighting, Removal and Installation).

GO to A4

A4 CHECK THE SIDE MARKER LAMPS SUPPLY CIRCUIT FOR AN OPEN

Place the headlamp switch in the OFF position. Ignition OFF. Disconnect: BCM C2280G. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1127-2		C2280G-3

Is the resistance less than 3 ohms?

Yes	GO to A5
No	REPAIR the circuit.

A5 CHECK THE SIDE MARKER LAMPS SUPPLY CIRCUIT FOR A SHORT TO GROUND

Disconnect: Except China, LH Headlamp C1021 and RH Headlamp C1041. Disconnect: RH Front Side Marker Lamp C1126. Measure:

Click to display connectors

Positive Lead	Measurement / Action	Negative Lead
C1127-2		Ground

Is the resistance greater than 10,000 ohms?

Yes GO to A26 No REPAIR the circuit. After the repair: If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation. If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT

Original table alignment retained · Scroll horizontally if needed

Source reference 5662

2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.