PINPOINT TEST AF: THE Instrument Cluster (IC) IS INOPERATIVE

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

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES .

AF1 CHECK THE IC B+ VOLTAGE SUPPLY
- Ignition OFF.
- Disconnect: IC C220.
- Measure the voltage between the IC C220-19, circuit SBP26 (YE/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between IC C220-19 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to AF2 .
- No: VERIFY SJB fuse 26 (10A) is OK. If OK, REPAIR the circuit for an open. If not OK, REFER to the SYSTEM WIRING DIAGRAMS - ESCAPE or SYSTEM WIRING DIAGRAMS - MARINER to identify the possible causes of the circuit short. TEST the system for normal operation.
AF2 CHECK THE IC RUN/START AND RUN/ACC VOLTAGE SUPPLY
- Ignition ON.
- Measure the voltage between the IC C220-6, circuit CBP43 (GY), harness side and ground; and between the IC C220-20, circuit CBP29 (WH/VT), harness side and ground.
  
  Fig 2: Measuring Voltage Between IC C220-6 And Ground
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
- Yes: GO to AF3 .
- No: VERIFY SJB fuses 29 (5A) and 43 (10A) are OK. If OK, REPAIR the circuit. If not OK, REFER to the SYSTEM WIRING DIAGRAMS - ESCAPE or SYSTEM WIRING DIAGRAMS - MARINER to identify the possible causes of the circuit short. TEST the system for normal operation.
AF3 CHECK THE IC GROUND CIRCUITS FOR AN OPEN
- Ignition OFF.
- Disconnect: Negative Battery Cable.
- Measure the resistance between the IC C220-9, circuit GD112 (BK/GN), harness side and ground; and between the IC C220-10, circuit GD114 (BK/BU), harness side and ground.
  
  Fig 3: Measuring Resistance Between IC C220-9 And Ground
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes: GO to AF4 .
- No: REPAIR the circuit. TEST the system for normal operation.
AF4 CHECK FOR CORRECT IC OPERATION
- Disconnect the IC connector.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect the IC 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 IC. REFER to INSTRUMENT CLUSTER (IC) . 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.