Here's a general outline. Specific steps may vary slightly depending on the exact trim and configuration of your truck:
1. Preparation:
* Safety First: Disconnect the negative battery cable. This prevents accidental shorts and shocks.
* Gather Tools: You'll need a Phillips head screwdriver, possibly a flathead screwdriver, a socket set (likely metric), wire strippers/cutters, possibly a small pry bar, and electrical tape. A wiring diagram specific to your truck's year and model will be incredibly helpful. You can usually find these online.
* Steering Wheel Removal (Possibly): On some 1986 F-150s, the ignition switch is behind the steering wheel, requiring its removal. This usually involves removing the horn contact (often a nut on the steering wheel's center), then using a steering wheel puller. Be extremely careful when removing the steering wheel – it can be difficult and potentially damaging. If you're unsure, a professional is best.
2. Accessing the Ignition Switch:
* Column Removal (Possibly): Depending on your truck, you may need to partially or completely remove the steering column to access the ignition switch. This usually involves removing bolts and potentially disconnecting linkages and other components. This is a more complex step and requires careful observation and possibly consultation with a repair manual.
* Locate the Switch: Once you have access (either through the steering wheel or column removal), locate the ignition switch itself. It's usually a cylindrical component with various wires connected to it.
3. Removing the Old Ignition Switch:
* Disconnect Wiring: Carefully disconnect all wires from the ignition switch. Make note of their positions – take pictures or use a diagram, as reassembly will require accurate placement.
* Remove the Switch: There are usually screws or retaining clips holding the switch in place. Carefully remove these. The switch may be held in with a retaining clip on the back. You may need a small pry tool to help.
* Remove the Cylinder (if separate): The ignition cylinder (the part where you insert your key) is often separate from the switch itself. There may be a retaining clip or screws holding it in place.
4. Installing the New Ignition Switch:
* Install the Cylinder (if separate): If the cylinder was removed, install the new one ensuring it's securely in place.
* Install the Switch: Carefully install the new ignition switch, ensuring it's correctly aligned and seated. Secure it with the appropriate screws or retaining clips.
* Reconnect Wiring: Carefully reconnect all the wires to the new ignition switch, matching them exactly to the way they were connected to the old switch. Use your notes or photos. Double-check your work.
* Test: Reconnect the negative battery cable. Test the ignition switch to ensure it functions correctly (start, accessories, etc.).
5. Reassembly:
* Reinstall the Column (if removed): Carefully reinstall the steering column if you removed it.
* Reinstall the Steering Wheel (if removed): If the steering wheel was removed, reinstall it. Torque the steering wheel nut to the manufacturer's specifications to prevent damage. Ensure the wheel is straight.
Important Notes:
* Repair Manual: A repair manual specific to your 1986 Ford F-150 is highly recommended. It will provide detailed diagrams and instructions.
* Wiring Diagram: A wiring diagram is crucial for correctly connecting the wires to the new ignition switch.
* Professional Help: If you're not comfortable with this level of mechanical work, taking your truck to a qualified mechanic is strongly advised. Improperly installing the ignition switch can lead to electrical problems and even safety hazards.
This is a general guide; specific steps might differ. Always consult a repair manual for your specific vehicle model before attempting this repair. Take your time, be methodical, and prioritize safety.
