Pinpoint Test F: The Headlamps Are On Continuously

F1 DETERMINE THE CONDITION
- Key in ON position.
- Observe the headlamps.
- Are the high beams continuously illuminated?
- Yes : GO to F9.
- No : GO to F2.
F2 CHECK THE HEADLAMP SWITCH
- Key in OFF position.
- Disconnect: Headlamp Switch C205.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : GO to F3.
- No : INSTALL a new headlamp switch. REFER to HEADLAMP SWITCH . TEST the system for normal operation.
F3 CHECK CIRCUIT 15S-LE19 (GN/BU) FOR A SHORT TO POWER
- Key in OFF position.
- Disconnect: Multifunction Switch C202.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : GO to F5.
- No : GO to F4.
F4 CHECK THE MULTIFUNCTION SWITCH (LOW BEAMS)
- Key in OFF position.
- Carry out the multifunction switch component test. Refer to COMPONENT TESTING article .
- Is the multifunction switch OK?
- Yes : REPAIR circuit 15S-LE14 (GN/RD). TEST the system for normal operation.
- No : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
F5 CHECK CIRCUITS 15S-LE16 (GN/OG) (LH HEADLAMP) AND 15S-LE23 (GN/WH) (RH HEADLAMP) FOR A SHORT TO POWER
- Key in OFF position.
- Disconnect: BJB Fuse 16.
- Disconnect: BJB Fuse 17.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : REPAIR the circuit in question. TEST the system for normal operation.
- No : GO to F6.
F6 CHECK CIRCUITS 15S-LE16 (GN/OG) (LH HEADLAMP) AND 15S-LE23 (GN/WH) (RH HEADLAMP) FOR A SHORT TO POWER
- Key in OFF position.
- Connect: BJB Fuse 16.
- Connect: BJB Fuse 17.
- Disconnect: Low Beam Relay C1049.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : REPAIR or INSTALL a new BJB. TEST the system for normal operation.
- No : If equipped with DRL, GO to F7.
If not equipped with DRL, GO to F8.
F7 CHECK CIRCUIT 15S-LE8 (GN/RD) FOR VOLTAGE
- Key in OFF position.
- Measure the voltage between the low beam relay C1049-4, circuit 15S-LE8 (GN/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between Low Beam Relay C1049-4, Circuit 15S-LE8 (GN/RD), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REFER to DAYTIME RUNNING LAMPS to continue diagnosis of the DRL.
- No : GO to F8.
F8 CHECK CIRCUIT 15S-LE19 (GN/BU) FOR VOLTAGE
- Measure the voltage between the low beam relay C1049-1, circuit 15S-LE19 (GN/BU), harness side and ground.
  
  Fig 2: Measuring Voltage Between Low Beam Relay C1049-1, Circuit 15S-LE19 (GN/BU), 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 low beam relay. TEST the system for normal operation.
F9 CHECK THE MULTIFUNCTION SWITCH (HIGH BEAMS)
- Key in OFF position.
- Disconnect: Multifunction Switch C202.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : GO to F10.
- No : INSTALL a new multifunction switch. REFER to STEERING COLUMN SWITCHES . TEST the system for normal operation.
F10 CHECK CIRCUITS 15S-LE15 (GN/BK) (LH HEADLAMP) AND 15S-LE22 (GN/OG) (RH HEADLAMP) FOR A SHORT TO POWER
- Key in OFF position.
- Disconnect: BJB Fuse 26.
- Disconnect: BJB Fuse 27.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : REPAIR the circuit in question. TEST the system for normal operation.
- No : GO to F11.
F11 CHECK CIRCUITS 15S-LE15 (GN/BU) AND 15S-LE22 (GN/BU) FOR A SHORT TO POWER
- Key in OFF position.
- Connect: BJB Fuse 26.
- Connect: BJB Fuse 27.
- Disconnect: High Beam Relay C1050.
- Key in ON position.
- Do the headlamps continue to illuminate?
- Yes : REPAIR or INSTALL a new BJB. TEST the system for normal operation.
- No : GO to F12.
F12 CHECK CIRCUIT 15S-LE12 (GN/YE) FOR A SHORT TO POWER
- Measure voltage between the high beam relay C1050-1, circuit 15S-LE12 (GN/YE), harness side and ground.
  
  Fig 3: Measuring Voltage Between High Beam Relay C1050-1, Circuit 15S-LE12 (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 : INSTALL a new high beam relay. TEST the system for normal operation.