Jeep CJ5 Ignition Switch Guide (1963-1973): Symptoms and Replacement
Don't let a faulty ignition switch leave your classic 1963-1973 CJ5 stranded on the trail or roadside.
- A failing ignition switch can cause no-start conditions, stalling, and intermittent electrical problems that mimic other failures.
- For this classic CJ5, the replacement is a straightforward DIY job that most owners can complete in under an hour.
- Choosing a quality aftermarket brand like Standard Ignition is recommended for reliability over budget options.
- Always test the battery and starter connections before assuming the ignition switch is the problem.
Common Symptoms of a Failing Ignition Switch
A bad ignition switch in a classic CJ5 can cause some confusing problems. The symptoms often mimic issues with the battery, starter, or carburetor. Before replacing other parts, check if your ignition switch is the real culprit.
🎬 Watch this video to learn more about bad ignition switch symptoms.- Engine Won't Crank: You turn the key and get nothing—no click, no sound from the starter. This can happen when the switch's internal contacts wear out and fail to send power to the starter circuit.
- Starts and Immediately Stalls: The engine fires up while you're holding the key in the "start" position but dies as soon as you let it go back to the "run" position. This points to a failure in the switch to maintain power to the ignition system once the engine is running.
- Engine Stalls While Driving: One of the more serious symptoms is the engine suddenly cutting out on the road, especially when hitting a bump. This indicates a loose or worn internal connection that is momentarily losing contact.
- Intermittent Electrical Issues: Your dashboard lights might flicker, or accessories like the radio and wipers may cut in and out. This happens because the switch isn't providing consistent power to the accessory circuits.
- Key is Hard to Turn: If the key feels stuck, jammed, or difficult to turn, the mechanical part of the switch or the lock cylinder may be worn out or binding.
Safety First: Diagnose Before You Drive
An engine that stalls unexpectedly is a major safety hazard, as it can result in the loss of power braking and steering assist. If you suspect your ignition switch is failing, it's best to diagnose and repair the issue before driving the vehicle.
Choosing the Right Aftermarket Ignition Switch
For a vehicle as old as the 1963-1973 CJ5, new OEM (Original Equipment Manufacturer) parts are generally not available. The market consists of aftermarket replacements that vary in quality. For a part as essential as the ignition switch, reliability is paramount.
Brand Tiers:
- Standard Ignition (SMP): Often regarded as a higher-quality aftermarket brand, Standard Ignition parts are known for their reliability and proper fit. They use quality materials like copper alloy conductors to ensure good electrical performance. For a critical component, spending a little more on a trusted brand like Standard can prevent future headaches.
- Replacement/Value Brands: These are budget-friendly options. While the initial cost is lower, some owners in forums have reported premature failures with lower-cost switches. For a part that can leave you stranded, a budget switch might be a gamble. However, for a weekend trail rig where a potential failure isn't critical, it might be an acceptable choice.
Pro Tip: Given the simplicity and importance of this part, many experienced CJ owners recommend choosing a reputable brand like Standard Ignition. Some even suggest buying a spare to keep in the glovebox, just in case.
Cost of Replacing a CJ5 Ignition Switch
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $33 - $53 |
| Shop Labor | $90 - $150 |
| Total Estimated Cost (at a shop) | $123 - $203 |
Frequently Asked Questions (FAQ)
Can I replace the ignition switch myself?
Yes, this is a very common DIY job for CJ5 owners. The ignition switch is typically mounted on the dashboard and is accessible with basic hand tools. The process involves disconnecting the battery, removing the switch's retaining nut from the dash, and unplugging the wiring harness from the back. It's generally considered an easy repair that takes less than an hour.
What's the difference between the ignition switch and the lock cylinder?
The lock cylinder is the mechanical part you put your key into. The ignition switch is the electrical component that the lock cylinder turns. Sometimes the cylinder can fail while the switch is fine, and vice-versa. For the 1963-1973 CJ5, they are often sold as a complete assembly with new keys.
My Jeep won't start, but the lights work. Is it the ignition switch?
It could be. If the lights and accessories work (in the ACC or ON position) but the engine doesn't crank, the problem is likely in the "start" circuit. This could be the ignition switch, the starter solenoid, the neutral safety switch (if equipped), or the wiring between them. A common failure point is the contact inside the ignition switch that sends power to the starter solenoid.
Are there any recalls for the 1963-1973 CJ5 ignition switch?
No, searches of the NHTSA database show no recalls for the ignition switch on this specific year range of Jeep CJ5. Recalls for Jeep ignition switches were for much newer models, like the 2005-2007 Grand Cherokee.
Helpful Videos
Technical Specifications
OEM Part Numbers: 924918 947399 J5454951
Dash-mounted, screw-on bezel, multi-pin connector. Typically includes lock cylinder and two keys.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.