Pinpoint Test Q: The High Beam Indicator Is Never/Always On

Q1 CHECK THE HIGH BEAM LAMP OPERATION
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- Key in ON position.
- Operate the high beams.
- Do the high beams operate correctly?
1. Yes: GO to Q2.
2. No: REFER to EXTERIOR LIGHTING .
Q2 CHECK CIRCUIT 932 (GY/WH) AND CIRCUIT 12 (LG/BK) FOR AN OPEN
- Key in OFF position.
- Disconnect: Instrument Cluster C220b.
- Key in ON position.
- Measure the voltage between the instrument cluster C220b pin 2, circuit 12 (LG/BK), harness side and ground, while turning the high beams on and off.
  
  Fig 1: Checking Circuit 932 (GY/WH) And Circuit 12 (LG/BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the voltage 0 volts with the high beams off and greater than 10 volts with the high beams on?
1. Yes: GO to Q3.
2. No: REPAIR the circuit. TEST the system for normal operation.
Q3 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?
1. Yes: INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . TEST the system for normal operation.
2. No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.