General Steps (Consult your repair manual for specifics):
1. Disconnect the Battery: Disconnect the negative (-) battery cable first.
2. Remove Steering Column Shroud/Cover: This usually involves removing screws or fasteners around the steering column. This will give you access to the ignition switch.
3. Disconnect Electrical Connectors: Several electrical connectors will be attached to the ignition switch. Carefully disconnect them, taking note of their positions. Take pictures if it helps. Some connectors may have retaining clips or screws.
4. Remove the Ignition Switch: The ignition switch is usually held in place by a retaining clip, screw, or a combination of both. You may need to use a special tool (often a small retaining clip removal tool) to release the switch. The location and method of removal will vary depending on your specific model. Again, your repair manual is essential here.
5. Install the New Ignition Switch: Carefully align the new ignition switch and install it in the reverse order of removal. Make sure it's fully seated.
6. Reconnect Electrical Connectors: Reconnect the electrical connectors you removed earlier, ensuring each connector is securely attached to the correct terminal.
7. Reinstall Steering Column Shroud/Cover: Replace the steering column shroud or cover.
8. Reconnect Battery: Reconnect the negative (-) battery cable.
9. Test the Ignition: Test the ignition switch by turning the key to ensure all positions (accessory, start, run) function correctly.
Important Considerations:
* Wiring Diagram: A wiring diagram specific to your 1985 Ford F-150 is incredibly helpful. This will aid in identifying and reconnecting the electrical connectors correctly.
* Key: You'll likely need your original key or have a new key cut to match your vehicle's ignition cylinder. Replacing the ignition switch may require re-keying or potentially replacing the entire ignition assembly.
* Security: Some ignition switches incorporate anti-theft measures. Be aware of this, as the replacement may need to be matched to your vehicle's system.
* Professional Help: If you're not comfortable performing this repair yourself, consider taking your truck to a qualified mechanic. Improper installation could lead to electrical problems or damage your vehicle.
This is a simplified overview. Always refer to a repair manual specific to your 1985 Ford F-150 for detailed instructions and diagrams. Failure to follow the correct procedure could damage your vehicle.
