Pinpoint Test A: The Key-In-Ignition Chime Is Inoperative

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

A1 CHECK THE INTERIOR LAMPS
- Open the driver door.
- Does the interior dome lamp illuminate when the driver door is open?
- Yes : GO to A2.
- No : REFER to INTERIOR LIGHTING to continue diagnosis of the interior lamps.
A2 CHECK THE KEY-IN-IGNITION CHIME OPERATION
- Key in OFF position.
- Insert the ignition key into the ignition switch with the driver door open.
- Does the chime sound?
- Yes : The system is operating correctly at this time.
- No : GO to A3.
A3 CHECK CIRCUIT 1414 (LG/VT) FOR VOLTAGE
- Remove the ignition key from the ignition switch.
- Disconnect: Instrument Cluster C220b.
- Insert the ignition key into the ignition switch.
- Measure the voltage between the instrument cluster C220b-15, circuit 1414 (LG/VT), harness side and ground.
  
  Fig 1: Measuring Voltage Between Instrument Cluster C220b-15, Circuit 1414 (LG/VT), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to A5.
- No : GO to A4.
A4 CHECK CIRCUIT 1414 (LG/VT) FOR AN OPEN OR A SHORT TO GROUND
- Remove the ignition key from the ignition switch.
- Disconnect: Ignition Switch C250.
- Measure the resistance between the instrument cluster C220b-15, circuit 1414 (LG/VT), harness side and the ignition switch C250-5, circuit 1414 (LG/VT), harness side; and between the instrument cluster C220b-15, circuit 1414 (LG/VT), harness side and ground.
  
  Fig 2: Checking Circuit 1414 (LG/VT) For An Open Or A Short To Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms between the instrument cluster and the ignition switch, and greater than 10,000 ohms between the instrument cluster and ground?
- Yes : INSTALL a new ignition switch. REFER to STEERING COLUMN SWITCHES . CLEAR the DTCs. REPEAT the self-test.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
A5 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 . 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. REPEAT the self-test.