LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2009 >> Explorer 4.6 8, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Instrument Cluster Illumination & Instrument Panel Illumination) >> Diagnostic Tests >> Instrument Cluster & Panel Illumination >> Pinpoint Tests >> Pinpoint Test E: The Steering Wheel Control Switch(es) Illumination Is Inoperative

Pinpoint Test E: The Steering Wheel Control Switch(es) Illumination Is Inoperative

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Cluster and Panel Illumination for schematic and connector information.

Normal Operation 

The lighting control module (LCM) supplies a variable pulse width modulated (PWM) voltage to the steering wheel control switches through circuit 484 (OG/BK). The steering wheel control switches are grounded through circuit 57 (BK).

This pinpoint test is intended to diagnose the following:

PINPOINT TEST E: THE STEERING WHEEL CONTROL SWITCH(ES) ILLUMINATION IS INOPERATIVE 

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE STEERING WHEEL CONTROL SWITCH(ES) FOR VOLTAGE 
    • Key in OFF position.
    • Remove the driver air bag module. Refer to SUPPLEMENTAL RESTRAINT SYSTEM article.
    • Disconnect: Inoperative Steering Wheel Control Switch
    • Key in ON position.
    • With the parking lamps on, rotate the instrument panel dimmer switch to the maximum brightness position.
      • Fig 1: Checking Switches For Voltage (With Audio/Climate Control Switches)
      GF0014436Courtesy of FORD MOTOR CO.
    • For vehicles equipped with audio/climate control switches, measure the voltage between the speed control switch C203-4, circuit 484 (OG/BK), harness side and ground; or between the audio/climate control switch C2208-1, circuit 484 (OG/BK), harness side and ground.
      • Fig 2: Checking Switches For Voltage (Without Audio/Climate Control Switches)
      GF0014437Courtesy of FORD MOTOR CO.
    • For vehicles without audio/climate control switches, measure the voltage between the speed control on/off switch C2330a-6, circuit 484 (OG/BK), harness side and ground; or between the speed control set switch C2330b-1, circuit 484 (OG/BK), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E4.
    2. NO  : Go to  E2.
  2. E2 CHECK THE STEERING WHEEL WIRING HARNESS FOR AN OPEN 
    • Disconnect: Clockspring C218b
      • Fig 3: Checking Circuit For Open
      GF0014438Courtesy of FORD MOTOR CO.
    • Measure the voltage between the clockspring C218b pin 4, component side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : REPAIR or INSTALL a new steering wheel wiring harness. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
    2. NO  : Go to  E3.
  3. E3 CHECK CIRCUIT 484 (OG/BK) FOR AN OPEN 
    • Disconnect: Clockspring C218a
      • Fig 4: Checking Circuit For An Open
      GF0014439Courtesy of FORD MOTOR CO.
    • Measure the voltage between the clockspring C218a-12, circuit 484 (OG/BK), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
  4. E4 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Key in OFF position.
      • Fig 5: Checking Circuit For Open (With Audio/Climate Control Switches)
      GF0014440Courtesy of FORD MOTOR CO.
    • For vehicles equipped with audio/climate control switches, measure the resistance between the speed control switch C203-3, circuit 57 (BK), harness side and ground; and between the audio/climate control switch C2208-2, circuit 57 (BK), harness side and ground.
      • Fig 6: Checking Circuit For Open (Without Audio/Climate Control Switches)
      GF0014441Courtesy of FORD MOTOR CO.
    • For vehicles without audio/climate control switches, measure the resistance between the speed control on/off switch C2330a-5, circuit 57 (BK), harness side and ground; and between the speed control set switch C2330b-2, circuit 57 (BK), harness side and ground.
    • Are the resistances less than 5 ohms? 
    1. YES  : INSTALL a new switch in question. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
    2. NO  : Go to  E5.
  5. E5 CHECK THE STEERING WHEEL WIRING HARNESS GROUND CIRCUIT(S) FOR AN OPEN 
    • Disconnect: Clockspring C218b
      • Fig 7: Checking Circuits For Open
      GF0014442Courtesy of FORD MOTOR CO.
    • Measure the resistance between the clockspring C218b pin 7, component side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : REPAIR or INSTALL a new steering wheel wiring harness. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
    2. NO  : Go to  E6.
  6. E6 CHECK THE CLOCKSPRING FOR AN OPEN 
    • Disconnect: Clockspring C218a
      • Fig 8: Checking Circuit For Open
      GF0014443Courtesy of FORD MOTOR CO.
    • Measure the resistance between the clockspring C218a-15, circuit 57 (BK), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new clockspring. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
    2. NO  : REPAIR the circuit. INSTALL the driver air bag module. REFER to SUPPLEMENTAL RESTRAINT SYSTEM article. TEST the system for normal operation.
scientia non olet · About LEMON Manuals