Most Likely Culprits:
* Short Circuit in the Ignition System: This is the most probable cause. A short could be anywhere in the wiring leading to the ignition switch, the ignition coil, the starter, or even within the ignition switch itself. Worn or frayed wiring is a common culprit, especially in older cars. Moisture intrusion can also cause shorts.
* Faulty Ignition Switch: The ignition switch itself might be failing, causing excessive current draw and blowing the fuse.
* Problematic Starter Motor: A shorted or damaged starter motor can draw a large amount of current, exceeding the fuse's rating.
* Ignition Coil: A faulty ignition coil can draw excessive current.
* Wiring harness to the starter: The main power wire running to the starter can short to ground.
Troubleshooting Steps (Proceed with caution. Disconnect the negative battery terminal before starting any work):
1. Visual Inspection: Carefully examine all wiring related to the ignition system. Look for any signs of fraying, melting, or damage, especially near the ignition switch, starter motor, and the fuse box. Pay close attention to the area where the wiring harness connects to the starter motor itself.
2. Check the Fuse: Before replacing the fuse, *try to identify WHY it blew*. Look for discoloration, a burnt smell, or other signs of damage on the fuse itself. If you're installing a replacement fuse that's the same amperage and it blows immediately, you have a short.
3. Test the Ignition Switch: This is difficult to test without specialized tools but a qualified mechanic will be able to test continuity and resistance within the ignition switch.
4. Test the Starter Motor: Again, this often requires professional testing tools. A mechanic can test the starter motor for shorts or internal problems. A clicking sound when you turn the key may indicate a failing starter.
5. Check the Ignition Coil: You can visually inspect the coil for cracks or damage. Testing it for proper resistance requires a multimeter and a knowledge of the coil's specifications.
6. Professional Help: If you're not comfortable working with car electronics, it's best to take your Stratus to a qualified mechanic or auto electrician. Improper repairs can lead to further damage or injury.
Important Notes:
* Fuse Amperage: Make sure you're using the correct amperage fuse. Using a higher amperage fuse is a fire hazard. Consult your owner's manual.
* Safety First: Always disconnect the negative battery terminal before working on any electrical components in your vehicle.
* Systematic Approach: Don't just keep replacing the fuse. Find the root cause of the short circuit to prevent further damage and potential fire.
A persistent blown ignition fuse is a serious issue. Don't drive the car until it's fixed. The underlying problem could cause a fire or leave you stranded.
