Pinpoint Test U: The Speed Control Indicator Is Never/Always On

U1 CHECK THE SPEED CONTROL OPERATION
- Verify the operation of the speed control.
- Does the speed control operate correctly?
  - Yes : GO to U2.
  - No : REFER to SPEED CONTROL to continue diagnosis of the speed control system.
U2 CHECK THE SPEED CONTROL INDICATOR OPERATION
- Key in OFF position.
- Disconnect: Speed Control Module C122.
- Connect a fused (10A) jumper wire between the speed control module C122 pin 1, circuit 8-PG11 (WH/BK), harness side and ground.
  
  Fig 1: Connecting Fused (10A) Jumper Wire Between Speed Control Module C122 Pin 1, Circuit 8-PG11 (WH/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Key in ON position.
- Does the speed control indicator illuminate with the jumper wire connected and turn off with the jumper wire disconnected?
  - Yes : INSTALL a new speed control module. REFER to SPEED CONTROL . TEST the system for normal operation.
  - No : GO to U3.
U3 CHECK CIRCUIT 8-PG11 (WH/BK) FOR AN OPEN OR SHORT TO GROUND
- Key in OFF position.
- Disconnect: Instrument Cluster C2220.
- Measure the resistance between the instrument cluster C2220 pin 18, circuit 8-PG11 (WH/BK), harness side and the speed control module C122 pin 1, circuit 8-PG11 (WH/BK), harness side; and between the instrument cluster C2220 pin 18, circuit 8-PG11 (WH/BK), harness side and ground.
  
  Fig 2: Checking Circuit 8-PG11 (WH/BK) For An Open Or Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the instrument cluster and the speed control module, and greater than 10,000 ohms between the instrument cluster and ground?
  - Yes : GO to U4.
  - No : REPAIR the circuit. TEST the system for normal operation.
U4 CHECK CIRCUIT 8-PG11 (WH/BK) FOR A SHORT TO POWER
- Key in ON position.
- Measure the voltage between the instrument cluster C2220 pin 18, circuit 8-PG11 (WH/BK), harness side and ground.
  
  Fig 3: Measuring Voltage Between Instrument Cluster C2220 Pin 18, Circuit 8-PG11 (WH/BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
  - Yes : REPAIR the circuit. TEST the system for normal operation.
  - No : GO to U5.
U5 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 determine if 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.