1. Battery and Connections:
* Check the battery terminals: Corrosion on the battery terminals is a common cause of power issues. Clean them thoroughly with a wire brush and baking soda solution. Make sure the connections are tight.
* Test the battery voltage: Use a multimeter to check the battery voltage. It should be around 12.6V when not running. If it's significantly lower, the battery is likely dead or failing. Try jump-starting the car to see if that solves the problem (if the battery terminals are clean).
2. Ignition Switch:
* This is the most likely culprit given the stuck key: The ignition switch itself might be faulty. A malfunctioning switch can prevent power from flowing to the rest of the car and also cause the key to stick. This often requires replacement.
* Try gently wiggling the key: Sometimes a little persuasion can free a stuck key if it's just a minor mechanical issue. Don't force it.
* Inspect the ignition cylinder: Look for any visible damage or debris that might be obstructing the key's movement.
3. Ignition Wiring:
* Check the ignition wiring harness: Look for any loose, broken, or corroded wires connecting to the ignition switch. This often requires some automotive electrical knowledge or a mechanic.
4. Neutral Safety Switch (Automatic Transmission):
* Only applies if you have an automatic transmission: This switch prevents the car from starting unless it's in Park or Neutral. A faulty switch could prevent power from flowing, though usually this would only prevent starting, not cut power to the entire car.
5. Alarm System:
* Consider any aftermarket alarm systems: A malfunctioning alarm system could potentially cut power to the car. Check for any alarm system indicators or disarming procedures.
6. Fuse Box:
* Check all fuses: While unlikely to cause both the no-power and stuck key simultaneously, a blown fuse is a quick check. Look at both the under-hood and interior fuse boxes.
7. Main Power Relay:
* A failed main power relay could cut off power completely. This relay is crucial for the car's electrical system.
Important Considerations:
* Safety First: If you're not comfortable working on car electrical systems, it's best to have a qualified mechanic diagnose and repair the problem. Improper electrical work can cause damage or injury.
* Key Removal: Forcing the key can damage the ignition cylinder. If you can't remove the key, professional help is recommended.
* Towing: If you've tried basic troubleshooting and are still without power, you might need to have the car towed to a mechanic.
This systematic approach should help pinpoint the issue. Remember to always prioritize safety and seek professional help if you are unsure about any step.
