Pinpoint Test D : The Steering Wheel Switch(Es) Illumination Is Inoperative
- D1 CHECK OTHER NON-NETWORK DIMMABLE LIGHTING SOURCES
- Ignition OFF.
- Place the headlamp switch in the parking lamps on position.
- Using the instrument panel dimmer switch, change the dimmable backlighting to its brightest setting.
Are all non-networked dimmable backlighting sources inoperative?
Yes GO to Pinpoint Test A . No If all steering wheel switches do not illuminate, GO to D2. If an individual steering wheel switch does not illuminate, GO to D5. - D2 CHECK THE HORN OPERATION
- Push the driver air bag against the steering wheel to activate the horn.
Does the horn sound?
Yes GO to D3. No REFER to Horn to diagnose the horn is inoperative. - D3 CHECK THE STEERING WHEEL BACKLIGHTING VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Disconnect: Clockspring C218A.
- Ignition ON.
- Measure the voltage
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C218A-9 VLN04 (VT/GY) -- Ground
Is the voltage greater than 11 volts?
Yes GO to D4. No REPAIR the circuit. - D4 CHECK THE STEERING WHEEL AND HARNESS
- Connect: Clockspring C218A.
- Remove the driver air bag module. Refer to Supplemental Restraint System .
- Disconnect: Clockspring C218B.
- Connect: Battery Ground Cable.
- Place the headlamp switch in the parking lamps on position.
- Using the instrument panel dimmer switch, change the dimmable backlighting to its brightest setting.
- Measure the component side voltage
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit C218B-9 VLN04 -- Ground
Is the voltage greater than 11 volts?
Yes REPAIR the steering wheel harness for an open or INSTALL a new steering wheel. REFER to Steering Column . No INSTALL a new clockspring. REFER to Supplemental Restraint System . - D5 CHECK THE SUSPECT STEERING WHEEL SWITCH FOR VOLTAGE
- Remove the driver air bag module. Refer to Supplemental Restraint System .
- Disconnect: Inoperative LH Steering Wheel Switch C2998 or RH Steering Wheel Switch C2999.
- Connect: Battery Ground Cable.
- Place the headlamp switch in the parking lamps on position.
- Using the instrument panel dimmer switch, change the dimmable backlighting to its brightest setting.
- Measure the voltage
between:
Positive Lead Negative Lead Pin Circuit Pin Circuit LH Steering Wheel Switch C2998-10 VLN04 C2998-5 RRH02 RH Steering Wheel Switch C2999-6 VLN04 C2999-1 RRH02
Is the voltage greater than 11 volts?
Yes INSTALL a new LH or RH steering wheel switch. REFER to Steering Column Switches . No REPAIR the steering wheel harness for an open or INSTALL a new steering wheel. REFER to Steering Column .