Pinpoint Test W: The Daytime Running Lamps (DRL) Are Inoperative

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

W1 VERIFY THE DRL OPERATION
- Key in ON position.
- Verify the parking brake is fully released.
- Are the DRL illuminated?
1. YES : The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.
2. NO : Go to W2.
W2 CHECK THE BRAKE WARNING INDICATOR (DRL INOPERATIVE)
- Observe the brake warning indicator.
- Is the brake warning indicator illuminated?
1. YES : REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES to diagnose the brake warning indicator.
2. NO : Go to W3.
W3 CHECK THE OPERATION OF THE HEADLAMPS
- Place the headlamp switch in the HEADLAMPS ON position and observe the headlamps.
- Do the headlamps operate correctly?
1. YES : Go to W4.
2. NO : REFER to Headlamps .
W4 CHECK THE IGNITION SWITCH INPUT
- Place the headlamp switch in the OFF position.
- Enter the following diagnostic mode on the diagnostic tool: SJB DataLogger
- Monitor the SJB ignition switch PID (IGN_SW) while cycling the ignition switch through all its positions.
- Does the PID agree with the ignition switch positions?
1. YES : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
2. NO : REFER to STEERING COLUMN SWITCHES to diagnose the input from the ignition switch.