1. Starter: Since you've mentioned that the starter has been replaced, it's possible that there might be an issue with the new starter. Ensure that the starter is compatible with your Jeep TJ and that it is properly installed. Check for any loose connections or damaged wiring related to the starter.
2. Ignition switch: The ignition switch is responsible for sending power to the starter solenoid. A faulty ignition switch can cause intermittent power supply, leading to the fuse blowing. Check the ignition switch for any wear or damage, and test its functionality.
3. Wiring issue: Inspect the wiring harness that connects the battery, starter, and ignition switch. Look for any loose connections, damaged insulation, or corrosion. Ensure that all the connections are tight and secure.
4. Short circuit: There might be a short circuit somewhere in the starting circuit. This can be caused by a pinched or damaged wire, or by components coming into contact with each other. Carefully examine the wiring and components to identify any potential short circuits.
5. Solenoid: The starter solenoid is responsible for engaging the starter motor. A faulty solenoid can draw excessive current, causing the fuse to blow. Check the solenoid for any damage or malfunction.
6. Battery: A weak or faulty battery can also contribute to this issue. Ensure that the battery is in good condition and has sufficient charge. Check the battery terminals for any corrosion and clean them if necessary.
It's important to note that diagnosing electrical issues can be challenging and may require specialized tools and knowledge. If you're not comfortable troubleshooting electrical systems, it's best to seek assistance from a qualified mechanic.
