Pinpoint Test Ad: The Instrument Cluster Is Inoperative

Test Step 

AD1 CHECK HOT AT ALL TIMES POWER SUPPLY CIRCUIT 

• Key in OFF position.
• Disconnect: Instrument Cluster C220b.
• Measure the voltage between the instrument cluster C220b-3, circuit 29-GG11 (OG/BU), harness side and ground.
  Fig 1: Measuring Voltage Between Instrument Cluster C220B-3, Circuit 29-GG11 (OG/BU), Harness Side & Ground

  Courtesy of FORD MOTOR CO.
• Is the voltage greater than 10 volts? 

Result/Action to Take 

Yes 

GO to AD2.

No 

REPAIR the circuit. TEST the system for normal operation.

Test Step 

AD2 CHECK HOT IN RUN POWER SUPPLY CIRCUITS 

• Disconnect: Instrument Cluster C220a.
• Key in ON position.
• Measure the voltage between the instrument cluster and ground as follows:
  INSTRUMENT CLUSTER
  
  

  Connector Pin	Circuit
  C220a-11	15-JA14 (GN/BK)
  C220b-6	15-GG1 (GN/BU)
  C220b-17	75-GG15 (YE/GN)

  Fig 2: Measuring Voltage Between Instrument Cluster & Ground

  Courtesy of FORD MOTOR CO.
• Are the voltages greater than 10 volts? 

Result/Action to Take 

Yes 

GO to AD3.

No 

REPAIR the circuit(s). TEST the system for normal operation.

Test Step 

AD3 CHECK GROUND CIRCUITS 

• Key in OFF position.
• Measure the resistance between the instrument cluster C220b-13, circuit 91-GG11 (BK/BU), harness side and ground; and between the instrument cluster C220a-6, circuit 31-AL11 (BK), harness side and ground.
  Fig 3: Checking Ground Circuits

  Courtesy of FORD MOTOR CO.
• Are the resistances less than 5 ohms? 

Result/Action to Take 

Yes 

GO to AD4.

No 

REPAIR the circuit(s). TEST the system for normal operation.

Test Step 

AD4 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION 

• Disconnect all instrument cluster connectors.
• Check for:
  • corrosion
  • pushed-out pins
• Connect all instrument cluster connectors and make sure they seat correctly.
• Operate the system and verify the concern is still present.
• Is the concern still present? 

Result/Action to Take 

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. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.