Pinpoint Test B: The Instrument Cluster Illumination Is Inoperative

B1 CHECK THE TURN SIGNALS
- Key in ON position.
- Place the multifunction switch in the left turn position and check the left turn indicator on the instrument cluster.
- Is the left turn indicator on the instrument cluster operating correctly?
- Yes : GO to B2.
- No : REPAIR the instrument cluster. REFER to INSTRUMENT CLUSTER .
B2 CHECK CIRCUIT 1045 (DB/WH) FOR AN OPEN
- Key in OFF position.
- Disconnect: Instrument Cluster C220.
- Measure the voltage between the instrument cluster C220 pin 17, circuit 1045 (DB/WH), harness side and ground, while the headlamp switch is in the PARK position and the instrument panel dimmer switch in the fully illuminated position.
  
  Fig 1: Measuring Voltage Between Instrument Cluster C220 Pin 17 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to B3.
- No : REPAIR the circuit. TEST the system for normal operation.
B3 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 . REPEAT the Instrument Cluster self-test.
- No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.