1. Safety First:
* Disconnect the negative battery cable. This is crucial to prevent accidental short circuits and electrical shocks.
2. Preparation:
* Gather your tools: You'll need a set of metric sockets (likely 7mm, 8mm, 10mm, and possibly others), screwdrivers (Phillips and possibly flathead), pliers, and possibly a wiring harness connector removal tool.
* Acquire the replacement ignition switch: Ensure you get the correct part for your specific truck. Providing your VIN to a parts supplier will guarantee the correct part.
* Have a flashlight handy: The area is often cramped and poorly lit.
* Consider taking pictures: Before disconnecting anything, take pictures of the wiring harness connections so you know how to reconnect them correctly.
3. Accessing the Ignition Switch:
* Steering column shroud removal: The ignition switch is located behind the steering column. You'll need to remove the shroud (plastic cover) around the steering column. This typically involves removing screws or bolts holding it in place. The exact method varies slightly between models.
* Steering wheel removal (possibly): In some cases, partial or complete removal of the steering wheel might be necessary for better access. This is a more involved step, requiring special tools (steering wheel puller) and knowledge to avoid damaging the airbag (if equipped, though unlikely in an '87). If you're uncomfortable doing this, consult a professional.
4. Replacing the Ignition Switch:
* Wiring harness disconnection: Carefully disconnect the wiring harness connectors from the old ignition switch. Again, pictures taken earlier are invaluable here. Note the color codes and positions of the wires.
* Removing the old switch: The switch is likely held in place by screws or a retaining clip. Remove these fasteners to release the old switch.
* Installing the new switch: Carefully install the new ignition switch, ensuring it's seated correctly and all fasteners are tightened securely.
* Reconnecting the wiring harness: Carefully reconnect the wiring harness connectors to the new ignition switch, matching the colors and positions from your pictures or notes.
5. Reassembly:
* Reinstall the steering wheel (if removed): If you removed the steering wheel, reinstall it carefully, ensuring it's properly aligned. This step requires expertise; if you're not confident, seek professional help.
* Reinstall the steering column shroud: Replace the steering column shroud and secure it with the screws or bolts.
6. Testing:
* Reconnect the negative battery cable.
* Test the ignition system: Try the ignition switch in all positions (accessories, ignition, start). Check that the lights, horn, and other related accessories work correctly.
Disclaimer: This is a general overview. The exact procedure may differ slightly depending on your specific truck model. Improperly performing this repair could result in damage to your vehicle or personal injury. If you are not comfortable performing this repair yourself, it is strongly recommended that you take your truck to a qualified mechanic. Use a repair manual specific to your vehicle for detailed instructions and diagrams.
