Pin Point Test P: The LH Turn Indicator Is Never On
WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- P1 VERIFY TURN SIGNAL OPERATION
- Verify the LH turn signal operation.
- Does the LH turn signal operate correctly?
Yes : GO to P2.
No : REFER to EXTERIOR LIGHTING to continue diagnosis of the turn signals.
- P2 CHECK CIRCUIT 3 (LG/WH) FOR VOLTAGE
- Disconnect: Instrument Cluster C220a.
- Key in ON position.
- Place the multifunction switch in the LH turn signal position.
- Measure the voltage between the instrument cluster C220a-1, circuit 3 (LG/WH), harness side and ground.
- Does the voltage fluctuate between 0 and greater than 10 volts?
Yes : GO to P3.
No : REPAIR the circuit. TEST the system for normal operation.
- P3 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the instrument cluster C220a-1C, circuit 57 (BK), harness side and ground.
- Is the resistance less than 5 ohms?
Yes : GO to P4.
No : REPAIR the circuit. TEST the system for normal operation.
- P4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all the instrument cluster connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the instrument cluster connectors and make sure they seat correctly.
- Operate the system and verify 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. TEST the system for normal operation.