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

Headlight Switch


The headlight switch is located on the left side of the instrument panel. A rheostat dial, usually located just above the headlight/parking light switch, is used to control the illumination of the instrument panel lighting.

A dimmer switch is mounted on the lower back of the steering column (near the ignition switch) and is actuated by the multi-function lever. For dimmer switch removal and installation, please refer to the steering column procedures located in Chapter 8 of this manual.


See Figure 1

  1. Disconnect the negative battery cable.
  3. From under the headlight switch assembly, remove the trim plate/switch assembly retaining screws.

For some vehicles equipped with a fog lamps, the lamp switch may have to be removed in order to access the headlight trim plate/switch screw.

  1. Pull the switch trim plate from the instrument panel. On late model vehicles, pivot the trim plate outward at the bottom, then pull the plate downward to release it.
  3. Disengage the electrical wiring connectors from the rear of the switch/trim plate assembly.
  5. Remove the headlight switch from the trim plate assembly; if necessary, replace the switch.
  7. To install, reverse the removal procedures.

Click image to see an enlarged view

Fig. Fig. 1: Exploded view of a common late model headlight switch and trim plate assembly