Pinpoint Test P: The LH Turn Signal Indicator Is Never/Always On

P1 VERIFY THE TURN SIGNAL OPERATION
- Key in ON position.
- Verify the exterior turn signal operation.
- Do the exterior turn signals operate correctly?
  - Yes : GO to P2.
  - No : REFER to EXTERIOR LIGHTING to continue diagnosis of the turn signals.
P2 DETERMINE THE CONDITION
- Observe the LH turn signal operation.
- Is the LH turn signal inoperative?
  - Yes : GO to P3.
  - No : If the LH turn signal indicator is always on, GO to P5.
P3 CHECK CIRCUIT 49S-LG15 (BU/BK) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Instrument Cluster C2220.
- Key in ON position.
- Place the multifunction switch in the LH turn signal position.
- Measure the voltage between the instrument cluster C2220 pin 26, circuit 49S-LG15 (BU/BK), harness side and ground.
  
  Fig 1: Measuring Voltage Between Instrument Cluster C2220 Pin 26, Circuit 49S-LG15 (BU/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Does the voltage fluctuate between 0 and greater than 10 volts?
  - Yes : GO to P7.
  - No : GO to P4.
P4 CHECK CIRCUIT 49S-LG15 (BU/BK) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Generic Electronic Module (GEM) C201d.
- Measure the resistance between the instrument cluster C2220 pin 26, circuit 49S-LG15 (BU/BK), harness side and the GEM C201d pin 3, circuit 49S-LG15 (BU/BK), harness side; and between the instrument cluster C2220 pin 26, circuit 49S-LG15 (BU/BK), harness side and ground.
  
  Fig 2: Checking Circuit 49S-LG15 (BU/BK) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the instrument cluster and the GEM, and greater than 10,000 ohms between the instrument cluster and ground?
  - Yes : GO to P8.
  - No : REPAIR the circuit. TEST the system for normal operation.
P5 CHECK CIRCUIT 49S-LG15 (BU/BK) FOR A SHORT TO POWER
- Key in OFF position.
- Disconnect: Instrument Cluster C2220.
- Key in ON position.
- Measure the voltage between the instrument cluster C2220 pin 26, circuit 49S-LG15 (BU/BK), harness side and ground.
  
  Fig 3: Measuring Voltage Between Instrument Cluster C2220 Pin 26, Circuit 49S-LG15 (BU/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
  - Yes : GO to P6.
  - No : GO to P7.
P6 CHECK CIRCUIT 49S-LG15 (BU/BK) FOR A SHORT
- Key in OFF position.
- Disconnect: Instrument Cluster C2220.
- Disconnect: GEM C201d.
- Key in ON position.
- Measure the voltage between the instrument cluster C2220 pin 26, circuit 49S-LG15 (BU/BK), harness side and ground.
  
  Fig 4: Measuring Voltage Between Instrument Cluster C2220 Pin 26, Circuit 49S-LG15 (BU/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 : GO to P8.
P7 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect the instrument cluster connector.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect the instrument cluster connector and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
  - Yes : INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . TEST the system for normal operation.
  - No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
P8 CHECK FOR CORRECT GEM OPERATION
- Disconnect all the GEM connectors.
- Check for:
  - Corrosion
  - Pushed-out pins
- Connect all the GEM connectors and make sure they seat correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
  - Yes : INSTALL a new GEM. REFER to MULTIFUNCTION ELECTRONIC MODULES . TEST the system for normal operation.
  - No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.