Here's a general outline of the process. This is NOT a complete, step-by-step guide and should not be considered a substitute for a proper repair manual specific to your 1975 Dodge D100. You'll need that manual for precise diagrams and torque specifications.
1. Preparation:
* Disconnect the battery negative terminal. This is crucial to prevent electrical shocks and damage.
* Gather your tools: You'll need screwdrivers (Phillips and possibly flathead), possibly a socket set, pliers, and possibly a wiring diagram for your specific vehicle. A steering wheel lock removal tool might also be necessary if your steering wheel locks.
* Obtain the correct replacement ignition switch. Ensure it's the correct part number for your year and model. Auto parts stores can help you find the right one.
2. Accessing the Ignition Switch:
* Remove the steering wheel: This is often the most challenging part. You'll likely need a steering wheel puller, and the process varies depending on your steering wheel. Again, your repair manual will guide you. Take photos or make detailed notes as you go.
* Remove the steering column shroud/trim: This covers the ignition switch. It usually involves removing screws or fasteners.
* Disconnect the wiring harness: Carefully disconnect the wires from the old ignition switch. Make detailed notes or take pictures of the wiring connections to ensure you reconnect them correctly. A wiring diagram will be invaluable here. Label each wire carefully.
3. Removing the Old Ignition Switch:
* Remove the retaining screws or clips holding the ignition switch in place. This may be difficult to access and may require maneuvering tools in tight spaces.
* Carefully remove the old ignition switch. There might be a retaining ring or other mechanism holding it in place.
4. Installing the New Ignition Switch:
* Install the new ignition switch, reversing the removal process. Pay close attention to how the old switch was positioned.
* Reconnect the wiring harness, ensuring each wire is connected to the correct terminal. Refer to your notes and/or the wiring diagram. Double-check everything!
* Reinstall the steering column shroud/trim.
* Reinstall the steering wheel. This is the reverse of the removal process.
5. Testing:
* Reconnect the battery negative terminal.
* Test the new ignition switch: Try starting the vehicle. Check all ignition positions (accessories, ignition, start) and make sure they function correctly.
* Test all accessories and lights to ensure proper function.
Important Considerations:
* This process is significantly more complex than described here. This is a simplified overview. Consult a repair manual specific to your 1975 Dodge D100.
* Take your time and be meticulous. Rushing could lead to mistakes.
* If you're uncomfortable with any part of this process, seek professional help. A mechanic can do this quickly and correctly, saving you time and preventing potential damage.
* If your key doesn't turn smoothly afterwards, you may have an issue with the steering column lock or the ignition switch itself.
Remember, safety is paramount. Always disconnect the battery before working on electrical components. If you're not comfortable working with car electrical systems, it's best to leave this job to a professional.
