GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Turn Signal Switch

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REMOVAL & INSTALLATION



See Figures 1 through 7



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Fig. Fig. 1: Use a suitable lock plate compressor tool when removing the shaft lock



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Fig. Fig. 2: Early model wiring protectors are removed by pulling downward on the tabs provided



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Fig. Fig. 3: Removing the turn signal from the steering column



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Fig. Fig. 4: Late model turn signal switch mounting

When servicing any components on the steering column, should any fasteners require replacement, be sure to use only nuts and bolts of the same size and grade as the original fasteners. Using screws that are too long could prevent the column from collapsing during a collision.

The following procedures require the use of a lock plate compressor tool such as J-23653 or equivalent.



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Fig. Fig. 5: Exploded view of a common standard steering column



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Fig. Fig. 6: Exploded view of a common key release standard column



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Fig. Fig. 7: Exploded view of a common tilt steering column

Vehicles Through 1991
  1. Disconnect the negative battery cable.
  2.  
  3. Matchmark and remove the steering wheel. Please refer to the procedure earlier in this section for details.
  4.  

If necessary, the steering column may be removed for this service, but turn signal switch replacement should be possible with the column installed on most vehicles covered by this manual.

  1. Insert a small prytool into the slots between the steering shaft lock plate cover and the steering column housing, then pry upward to remove the cover from the lock plate.
  2.  
  3. Position a lock plate compressor tool such as J-23653-A or equivalent, by screwing the tool's center shaft onto the steering shaft (as far as it will go), then screw the center post nut clockwise until the lock plate is compressed.
  4.  
  5. Pry the locking plate snapring from the steering shaft slot.
  6.  

If the steering column is being disassembled on a bench, the steering shaft is free to slide out of the mast jacket when the snapring is removed.

  1. Carefully release and remove the lock plate compressor tool, then remove the lock plate.
  2.  
  3. Loosen the retaining screw, then remove the turn signal lever.
  4.  
  5. Remove the hazard warning knob; press the knob inward and then unscrew it.
  6.  
  7. Remove the turn signal switch assembly-to-steering column retaining screws.
  8.  

Whenever wiring and connectors must be pulled through the steering column, attach a length of mechanic's wire to the connector before beginning. Once the wiring and connector has been pulled through the column, leave the length of mechanic's wire in place (through the column) so it can be used to draw the connector back into position during installation.

  1. Pull the switch connector out of the bracket on the jacket and feed the switch connector through the column support bracket. Pull the switch straight up, guiding the wiring harness through the column housing and protector.
  2.  
  3. If equipped with a tilt column, position the housing in the "low'' position.
  4.  
  5. Remove the wiring protector by pulling downward and out of the column using a pair of pliers on the tab provided.
  6.  
  7. Remove the switch and wiring harness from the column.
  8.  

To install:

If used, the length of mechanic's wire may be used to help route the wiring harness.

  1. Install the turn signal assembly to the column by first routing the connector harness:
    1. On non-tilt columns, be sure that the electrical connector is on the protector, then feed it and the cover down through the housing and under the mounting bracket.
    2.  
    3. On tilt columns, feed the electrical connector down through the housing and under the mounting bracket, then install the cover onto the housing.
    4.  

  2.  
  3. Position the turn signal and clip the connector to the bracket on the jacket. Secure the turn signal using the retaining screws, then install the trim plate.
  4.  
  5. Install the hazard warning knob, then install the turn signal lever and retaining screws.
  6.  
  7. Position the turn signal in the Neutral or non-signalling position, then pull out the hazard warning knob to the hazard On position.
  8.  
  9. Install the washer, upper bearing preload spring and the cancelling cam onto the upper end of the shaft.
  10.  
  11. Position the lock plate and a NEW snapring over the shaft, then position the compressor tool. Use the tool to compress the lock plate as far as it will go, then slide the new snapring down the shaft and into the groove. Carefully release the compressor tool and make sure the lock plate is properly positioned.
  12.  
  13. Snap the lock plate cover into position.
  14.  
  15. Align and install the steering wheel.
  16.  
  17. Make sure the ignition is OFF , then connect the negative battery cable.
  18.  

1992-93 Vehicles
  1. Disconnect the negative battery cable.
  2.  
  3. Matchmark and remove the steering wheel. Please refer to the procedure earlier in this section for details.
  4.  
  5. Remove the shaft lock cover.
  6.  
  7. Push downward on the shaft lock assembly until the snapring is exposed using the shaft lock compressor tool.
  8.  
  9. Remove the shaft lock retaining snapring, then carefully release the tool and remove the shaft lock from the column.
  10.  
  11. Remove the turn signal cancelling cam assembly.
  12.  
  13. For standard columns, remove the upper bearing spring and thrust washer.
  14.  
  15. For tilt columns, remove the upper bearing spring, inner race seat and inner race.
  16.  
  17. Move the turn signal lever upward to the "Right Turn'' position.
  18.  
  19. Remove the access cap and disengage the multi-function lever harness connector, then grasp the lever and pull it from the column.
  20.  
  21. Loosen and remove the hazard knob retaining screw, then remove the screw, button, spring and knob.
  22.  
  23. Remove the screw and the switch actuator arm.
  24.  
  25. Remove the turn signal switch retaining screws, then pull the switch forward and allow it to hang from the wires. If the switch is only being removed for access to other components, this may be sufficient.
  26.  
  27. If the switch is being completely removed, disengage the wiring at the base of the column. Attach a length of mechanic's wire to the switch harness connector, then pull the harness through the column, leaving the mechanic's wire in place for installation purposes.
  28.  

On some vehicles access to the connector may be difficult. If necessary, remove the column support bracket assembly and properly support the column, and/or remove the wiring protectors.

  1. Remove the switch and wiring harness from the vehicle.
  2.  

To install:
  1. Install the switch and wiring harness to the vehicle. If the switch was completely removed, use the length of mechanic's wire to pull the switch harness through the column, then engage the connector.
  2.  

If the column support bracket or wiring protectors were removed, install them before proceeding.

  1. Position the switch in the column and secure using the retaining screws. Tighten the screws to 30 inch lbs. (3.4 Nm).
  2.  
  3. Install the switch actuator arm and retaining screw, then tighten the screw to 20 inch lbs. (2.3 Nm).
  4.  
  5. Install the hazard knob assembly, then install the multi-function lever.
  6.  
  7. Install the thrust washer and upper bearing spring (standard columns) or the inner race, upper bearing race seat and upper bearing spring (tilt columns), as applicable.
  8.  
  9. Lubricate the turn signal cancelling cam using a suitable synthetic grease (usually included in the service kit), then install the cam assembly.
  10.  
  11. Position the shaft lock and a NEW snapring, then use the lock compressor to hold the lock down while you seat the new snapring. Make sure the ring is firmly seated in the groove, then carefully release the tool.
  12.  
  13. Install the shaft lock cover.
  14.  
  15. Align and install the steering wheel.
  16.  
  17. Make sure the ignition is OFF , then connect the negative battery cable.
  18.  

 
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