Pinpoint Test B: The Daytime Running Lamps (DRL) Are On With The Ignition Switch Off

B1 CHECK THE DRL RESISTOR
- Key in OFF position.
- Disconnect: DRL Relay C1000.
- Disconnect: Low Beam Relay C1049.
- Measure the voltage between the low beam relay C1049 pin 4, circuit 15S-LE8 (GN/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between Low Beam Relay C1049 Pin 4, Circuit 15S-LE8 (GN/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
  - Yes : REPAIR or INSTALL a new BJB. TEST the system for normal operation.
  - No : GO to B2.
B2 CHECK THE CONTROL CIRCUIT OF THE DRL RELAY FOR A SHORT TO POWER
- Measure the voltage between the DRL relay C1000 pin 1, circuit 15S-LE6 (GN/YE), harness side and ground.
  
  Fig 2: Measuring Voltage Between Relay Connector And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
  - Yes : GO to B4.
  - No : GO to B3
B3 CHECK THE DRL RELAY
- Carry out the DRL Relay component test. Refer to COMPONENT TESTING .
- Is relay ok?
  - Yes : REFER to EXTERIOR LIGHTING to continue diagnosing the headlamp system.
  - No : INSTALL a new DRL relay. TEST the system for normal operation.
B4 ISOLATE THE SHORT TO THE POWER CIRCUIT
- Connect: DRL Relay C1000.
- Connect: Low Beam Relay C1049.
- Disconnect: CJB Fuse 59.
- Do the low beams continue to illuminate?
  - Yes : GO to B7.
  - No : GO to B5.
B5 CHECK THE IGNITION SWITCH
- Connect: CJB Fuse 59.
- Disconnect: Ignition Switch C250.
- Do the low beams continue to illuminate?
  - Yes : GO to B6.
  - No : INSTALL a new ignition switch. REFER to STEERING SYSTEM-GENERAL INFORMATION . TEST the system for normal operation.
B6 CHECK CIRCUIT 15-DA1 (GN/YE) FOR A SHORT TO POWER
- Disconnect: CJB C270e.
- Measure the voltage between the CJB C270e pin 10, circuit 15-DA1 (GN/YE), harness side and ground.
  
  Fig 3: Measuring Voltage Between CJB C270e Pin 10, Circuit 15-DA1 (GN/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
  - Yes : REPAIR the circuit. TEST the system for normal operation.
  - No : REPAIR or INSTALL a new CJB. TEST the system for normal operation.
B7 CHECK THE CJB
- Disconnect: CJB C270e.
- Do the low beams continue to illuminate?
  - Yes : GO to B8.
  - No : REPAIR or INSTALL a new CJB. TEST the system for normal operation.
B8 CHECK 15S-LE6 (GN/YE) FOR A SHORT TO POWER
- Disconnect: Headlamp Switch C205.
- Do the low beams continue to illuminate?
  - Yes : REPAIR the circuit. TEST the system for normal operation.
  - No : GO to B9
B9 CHECK CIRCUIT 15-LE29 (GN/BK) FOR A SHORT TO POWER
- Measure the voltage between the headlamp switch C205 pin 8, circuit 15-LE29 (GN/BK), harness side and ground.
  
  Fig 4: Measuring Voltage Between Headlamp Switch C205 Pin 8, Circuit 15-LE29 (GN/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
  - Yes : REPAIR the circuit. TEST the system for normal operation.
  - No : INSTALL a new headlamp switch. REFER to EXTERIOR LIGHTING . TEST the system for normal operation.