Yes | If the switch illumination is inoperative, GO to E2 If the switch illumination is always on, GO to E5 |
|---|---|
No | REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing). |
E2 CHECK THE ILLUMINATION CIRCUIT FOR VOLTAGE
Ignition OFF. Disconnect Driver lock/unlock switch C541. Place the headlight switch in the ON position and increase the the illumination to full intensity. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C541-4 | Ground |
Is the voltage greater than 11 volts?
Yes | INSTALL a new driver door lock/unlock switch. REFER to: Door Lock Control Switch (501-14 Handles, Locks, Latches and Entry Systems, Removal and Installation). |
|---|---|
No | GO to E3 |
E3 CHECK THE ILLUMINATION CIRCUIT FOR AN OPEN
Ignition OFF. Disconnect DDM C501A. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C541-4 | C501A-15 |
Is the resistance less than 3 ohms?
Yes | GO to E4 |
|---|---|
No | REPAIR the circuit. |
E4 CHECK THE ILLUMINATION CIRCUIT FOR A SHORT TO GROUND
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C541-4 | Ground |
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.