Pinpoint Test B: The Instrument Cluster Illumination Is Inoperative
- B1 CHECK CIRCUIT 29S-GG14 (OG) FOR POWER
- Disconnect: Instrument Cluster C2220.
- Place the headlamp switch in the parking lamps ON position.
- Rotate the instrument panel dimmer switch to the full illumination position.
- Measure the voltage between the instrument cluster connector C2220 pin 29, circuit 29S-GG14 (OG), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes
: GO to B2.
- No
: REPAIR the circuit. TEST the system for normal operation.
- B2 CHECK CIRCUIT 91-GG14 (BK/OG) FOR AN OPEN
- Turn the headlamp switch to the OFF position.
- Measure the resistance between the instrument cluster C2220 pin 30, circuit 91-GG14 (BK/OG), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes
: GO to B3.
- No
: REPAIR the circuit. TEST the system for normal operation.
- B3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect the instrument cluster connector.
- Check for:
- Corrosion
- Pushed-out pins
- Connect the instrument cluster connector and make sure it seats 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. CLEAR the DTCs. TEST the system for normal operation.