Pinpoint Test O: The RH Turn Indicator Is Never/Always On

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

O1 VERIFY THE TURN SIGNAL OPERATION
- Verify the exterior turn signal operation.
- Do the exterior turn signals operate correctly?
Yes : GO to O2.

No : REFER to EXTERIOR LIGHTING to continue diagnosis of the turn signals.
O2 DETERMINE THE CONDITION
- Observe the RH turn signal indicator.
- Is the RH turn signal indicator inoperative?
Yes : GO to O3.

No : GO to O5.
O3 CHECK CIRCUIT 2 (WH/LB) FOR VOLTAGE
- Disconnect: Instrument Cluster C220.
- Key in ON position.
- Place the multifunction switch in the RH turn signal position. Measure the voltage between the instrument cluster C220-18, circuit 2 (WH/LB), harness side and ground.
  
  Fig 1: Checking Circuit 2 (WH/LB) For Voltage
  Courtesy of FORD MOTOR CO.
- Does the voltage fluctuate between 0 and greater than 10 volts?
Yes : GO to O7.

No : GO to O4.
O4 CHECK CIRCUIT 2 (WH/LB) FOR AN OPEN OR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: SJB C2280e.
- Measure the resistance between the instrument cluster C220-18, circuit 2 (WH/LB), harness side and the C2280e-26, circuit 2 (WH/LB), harness side; and between the instrument cluster C220-18, circuit 2 (WH/LB), harness side and ground.
  
  Fig 2: Checking Circuit 2 (WH/LB) For Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the instrument cluster and the SJB, and greater than 10,000 ohms between the instrument cluster and ground?
Yes : GO to O9.

No : REPAIR the circuit in question. TEST the system for normal operation.
O5 CHECK CIRCUIT 2 (WH/LB) FOR VOLTAGE
- Key in OFF position.
- Disconnect: Instrument Cluster C220.
- Key in ON position.
- Measure the voltage between the instrument cluster C220-18, circuit 2 (WH/LB), harness side and ground.
  
  Fig 3: Checking Circuit 2 (WH/LB) For Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
Yes : GO to O6.

No : GO to O8.
O6 CHECK CIRCUIT 2 (WH/LB) FOR A SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: SJB C2280e.
- Key in ON position.
- Measure the voltage between the instrument cluster C220-18, circuit 2 (WH/LB), harness side and ground.
  
  Fig 4: Checking Circuit 2 (WH/LB) For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
Yes : REPAIR the circuit. TEST the system for normal operation.

No : GO to O9.
O7 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the instrument cluster C220-25, circuit 57 (BK), harness side and ground.
  
  Fig 5: Checking Circuit 57 (BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to O8.

No : REPAIR the circuit. TEST the system for normal operation.
O8 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 in this article. 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.
O9 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the SJB 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 SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES . CLEAR the DTCs. REPEAT the self-tests.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.