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Eric
Eric, Automotive Repair Shop Manager
Category: Pontiac
Satisfied Customers: 24216
Experience:  20+ yrs. experience as repair shop manager and technician.
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1999 Bonneville: air bags..steering wheel..ignition switch..activating

Resolved Question:

We have a 1999 Bonneville with air bags in the steering wheel. How do we safely remove the ignition switch without activating the air bags? What is the procedure for this?
Thanks,
Rhonda
Submitted: 4 years ago.
Category: Pontiac
Expert:  Eric replied 4 years ago.

Hi,

 

Below is procedure to replace the ignition switch, including disabling the airbag and removing the steering wheel:

 

disable airbag:

 

DISARMING THE SIR SYSTEM



 

Proper and safe operation requires the sensor, brackets and wiring to be installed in the exact locations of design. All components service must be exactly aligned and tighten to exact torque specification. It is not advisable to service the air bag system. The information provided is to help you understand the system and disarm the system if other non-air bag system service are to be performed.

Before beginning the disarming procedure, read all service precautions.

  1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
    1. Turn the ignition switch to the LOCK position, remove the key, then disconnect the negative battery cable.

  2. Wrap the end of the battery cable with tape to avoid possible terminal contact.
  3. Remove the AIRBAG fuse (fuse #7 for 1992-93 vehicles, or #1C for 1994-99 vehicles) from the fuse block.


With the AIRBAG fuse removed and the ignition in the

RUN position, the AIR BAG warning lamp illuminates. This is a normal operation and does not indicate a system malfunction.

  1. Remove the left side sound insulator/steering column filler panel and courtesy lamp, as needed.
  2. Remove the Connector Positive Assurance (CPA) lockpin on the yellow 2-way connector at the base of the steering column.
  3. Unplug the yellow 2-way SIR connector, located near the base of the steering column.




  1. If equipped with a passenger side air bag, remove the right side instrument panel sound insulator to access the connector. Remove the CPA lockpin, then unplug the yellow 2-way passenger inflator module connector. The connector is located at the base of the right side instrument panel, clipped to the knee bolster (tie bar and steering column filler).










Click image to see an enlarged view

Fig. Fig. 16: Location of the 1994-99 Pontiac passenger's side SIR connector

  1. If necessary, connect the negative battery cable. The system can now be safely serviced.

 

 

steering wheel:

 

  1. Properly disable the SIR system, as outlined in of this repair guide.
  2. If not already done, disconnect the negative battery cable.



CAUTION When carrying a live air bag, make sure the bag and trim cover and pointed away from the body. In the unlikely event of an accidental deployment, the bag will then deploy with minimal chance of injury. In addition, when placing a live air bag on a bench or other surface, always face the bag and trim cover up, away from the surface. This will reduce the chance of personal injury if it is accidentally deployed.

  1. Remove the SIR inflator module by performing the following steps:
    1. Unfasten the 2 inflator module attaching screws from the back of the steering wheel.
    2. Carefully lift the inflator module from the steering wheel to access the wire connectors.
    3. Push down and rotate the horn contact lead counterclockwise, and remove from the steering column tower.
    4. Remove the horn contact lead.
    5. Remove the CPA retaining clip from the SIR wiring connector. Detach the SIR wiring connector from the inflator module.
    6. If equipped, detach the steering wheel control switch connector.
    7. Remove the inflator module from the vehicle and position on a suitable workbench.

  2. Remove the steering wheel locknut.
  3. Matchmark the steering shaft and steering wheel to ensure proper alignment during installation.
  4. Install tools J 1859-03 and J 38720, or other suitable puller and side screws to the steering wheel, then remove the steering wheel from the vehicle.




Click image to see an enlarged view

Fig. Fig. 10: Install a suitable puller, then remove the steering wheel from the shaft



Click image to see an enlarged view

Fig. Fig. 11: Exploded view of the steering wheel and SIR inflator module mounting

To install:

  1. Feed the wiring through the slot in the steering wheel.
  2. Position the steering wheel on the shaft, aligning the mark on the steering wheel with the mark on the shaft.
  3. Install the steering wheel locknut and tighten to 30 ft. lbs. (41 Nm).
  4. Install the SIR inflator module by performing the following steps:
    1. If equipped, attach the steering wheel control switch connector.
    2. Install the CPA retainer to the SIR wiring connector.
    3. Feed the horn contact lead to the steering column horn tower; push the lead into the horn tower and rotate it clockwise to the locked position.
    4. Connect the horn ground lead.
    5. Attach the SIR connector and CPA.
    6. Position the inflator module to the steering wheel. Install the top surface of the module first to ease assembly and fit. Ensure that the inflator module is properly aligned with the steering wheel and that the wires behind the module are not pinched during installation.
    7. Install the inflator module attaching screws through the back of the steering wheel. Tighten the screws to 27 inch lbs. (3 Nm).

  5. Properly enable the SIR system, as outlined in of this repair guide.
  6. If not already done, disconnect the negative battery cable

 

turn signal switch:

 

  • If not already done, disconnect the negative battery cable.
  • Remove the steering wheel and the shroud.
  • Remove the inflation restraint (air bag module) coil assembly-to-steering shaft lock screw (home boss) and retaining ring. Remove the coil assembly from the shaft and allow it to hang freely.



  • Click image to see an enlarged view

    Fig. Fig. 1: If equipped with air bags, remove the inflator restraint coil from the steering column

    1. Position a suitable lock plate compression tool on the end of the steering shaft and compress the lock plate by turning the shaft nut clockwise. Pry the wire snapring out of the shaft groove.
    2. Remove the tool, then lift the lock plate from the shaft.
    3. Remove the canceling cam, upper bearing preload spring, bearing seat and inner race from the shaft.
    4. Position the turn signal switch in the right turn position. Remove the turn signal lever screw, then remove the lever.
    5. Remove the turn signal switch by performing the following steps:
      1. Remove the switch-to-steering column screws, then pull the switch out and allow it to hang freely.
      2. From under the dash, remove the retainer spring and wiring protector.
      3. Remove the hazard knob.
      4. Detach the electrical connector from the lower steering column, then gently pull the wiring connector through the gear shift lever bowl, the column housing and the lock housing cover. Remove the switch.




    Click image to see an enlarged view

    Fig. Fig. 2: Location of turn signal switch and related components

    To install:

    1. Route the turn signal switch harness through the steering column housing, then connect the switch and install the screw.
    2. Install the switch actuator arm and screw.
    3. Install the inner race, bearing seat and the bearing preload spring. Replace the turn signal canceling cam.
    4. Use lock plate compression tool to install the lock plate, compress the lock plate, then install the shaft lock retaining ring.
    5. To install the SIR inflation restraint coil, perform the following steps:
      1. Install the home boss-to-steering column lock screw, allowing the hub to rotate.
      2. While holding the coil assembly (in one hand) with the steering wheel connector facing upwards, rotate the coil hub in the appropriate direction until it stops; the coil ribbon is now wound snug.




    Click image to see an enlarged view

    Fig. Fig. 3: The SIR inflation restraint coil must be centered

      1. Rotate the coil hub 2 1 / 2 turns in the opposite direction until the center lock hole is even with the notch in the coil housing.




    Click image to see an enlarged view

    Fig. Fig. 4: Installed position of the inflation restraint coil



    Click image to see an enlarged view

    Fig. Fig. 5: Route the SIR coil assembly wires, making sure not to pinch them

      1. While holding the hub in position, install the lock screw into the center lock hole.
      2. Install the coil assembly using the horn tower on the inner ring canceling cam and outer ring projections for alignment purposes.

    1. Install the steering wheel and the shroud.
    2. If equipped with the SIR system, properly enable the system, as outlined in of this section.
    3. If not already done, connect the negative battery cable, then check the turn signals for proper operation.

     

    ignition cylinder:

     

    1. If equipped, disable the SIR system, as outlined in of this repair guide.
    2. If not already done, disconnect the negative battery cable.
    3. Remove the turn signal switch assembly.
    4. Remove the key from the lock cylinder. Remove the buzzer switch and clip.
    5. Reinsert the key into the lock cylinder and turn it to the LOCK position.
    6. Remove the cylinder lock-to-steering column screw, then remove the lock set.
    7. If equipped, detach the pass key connector.




    Click image to see an enlarged view

    Fig. Fig. 1: Removing the ignition lock cylinder

    To install:

    1. Install the lock cylinder, attach the pass key connector (if equipped), then tighten the lock-to-steering column screw to 22 inch lbs. (2.5 Nm).
    2. Position the key in the RUN position and reverse the removal procedures.
    3. Install the turn signal switch.
    4. If equipped with the SIR system, properly enable the system, as outlined in of this section.
    5. If not already done, connect the negative battery cable, then check the turn signals for proper operation.

     

     

     

     

    ignition switch:

    1. If equipped, disable the SIR system, as outlined in of this repair guide.
    2. If not already done, disconnect the negative battery cable.
    3. Lower the steering column; be sure to properly support it.




    Click image to see an enlarged view

    Fig. Fig. 1: Exploded view of the steering column housing

    1. Position the switch in the OFF-UNLOCKED position. With the lock cylinder removed, the rod is in LOCK when it is in the next to the uppermost detent; OFF-UNLOCKED is 2 detents from the top.
    2. Remove both switch screws, then remove the switch assembly.




    Click image to see an enlarged view

    Fig. Fig. 2: Location of the ignition and dimmer switches

    To install:

    1. Place the new switch in the OFF-UNLOCKED position. Ensure the lock cylinder and actuating rod are in OFF-UNLOCKED position (3rd detent from the top).
    2. Install the actuating rod into the switch and assemble the switch on the column. Tighten the mounting screws.

     

    Use only the specified screws since over-length screws could impair the collapsibility of the column.

    1. Install the steering column.
    2. If equipped with the SIR system, properly enable the system, as outlined in of this section.
    3. If not already done, connect the negative battery cable, then check the turn signals for proper operation.
    Eric, Automotive Repair Shop Manager
    Category: Pontiac
    Satisfied Customers: 24216
    Experience: 20+ yrs. experience as repair shop manager and technician.
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