1. Disconnect the Negative Battery Terminal:
- Ensure the vehicle is parked on a level surface, and the engine is off.
- Open the hood and disconnect the negative terminal (marked "-") of the battery using a suitable wrench.
- This will power off the car's electrical system, preventing unintended activation.
2. Locate the Headlight Dimmer Switch:
- Access the steering column in your 1991 Honda Civic.
- Below the steering column, locate the headlight dimmer switch.
- It is usually found on the left side of the steering wheel, near the turn signal lever.
3. Remove the Steering Column Cover:
- Use a Phillips-head screwdriver to loosen and remove the screws that secure the plastic cover around the steering column.
- Lift off the cover to gain access to the headlight dimmer switch.
4. Unplug the Switch Connector:
- Disconnect the electrical connector attached to the headlight dimmer switch.
- Press the connector tab and pull it out gently.
5. Remove the Switch Mounting Screws:
- Locate the screws holding the headlight dimmer switch onto the steering column.
- Use the Phillips-head screwdriver to loosen and remove these screws.
6. Remove the Old Switch:
- Carefully lift the switch assembly out of the mounting bracket.
7. Install the New Switch:
- Position the new headlight dimmer switch in its place and secure it with the screws removed earlier.
8. Reconnect the Connector:
- Connect the electrical connector to the new headlight dimmer switch.
- Make sure the connector is fully engaged.
9. Replace the Steering Column Cover:
- Reattach the steering column cover by inserting and tightening the screws removed in step 3.
10. Reconnect the Battery:
- Return to the engine compartment and reattach the negative terminal of the battery.
11. Test the Switch:
- Start the Honda Civic and turn on the headlights.
- Use the replaced dimmer switch to ensure that it functions correctly by adjusting the headlight intensity.
12. Clean Up:
- Clean up any tools or debris used during the replacement.
13. Dispose of the Old Switch:
- Dispose of the old headlight dimmer switch appropriately.
14. Close the Hood:
- Close the hood and ensure it is securely fastened.
